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Интернет-магазин «Азазель».Авторские украшения из натуральных драгоценных и полудрагоценных камней.

Камень «Рубеллит»

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Свойства и описание камня «Рубеллит»

Рубеллит ювелирный драгоценный каменьРубеллит — минерал, разновидность бороалюмосиликата турмалина. Относится к ювелирным драгоценным камням Первой группы Третьего порядка по классификации В.Я. Киевленко. Название происходит от латинского rubelus – красный. Среди турмалинов различают несколько минералов со своими названиями. Наиболее ценным и богатым оттенками считается эльбаит, названный так по острову Эльба, где добывали эту разновидности турмалина. Рубеллит представляет собой розовую, малиновую разновидность эльбаита (лат. rubella – «красноватый»). Розовый цвет, как и многим другим минералам, турмалину придаёт примесь марганца. Прозрачные кристаллы рубеллита являются драгоценным камнем II класса.

Рубеллит обладает привлекательной розовой или вишнёво-красной окраской (сиберит), обусловленной примесью незначительного количества двухвалентного марганца.

Физико-химические свойства Рубеллита

а) Химическая формула: Na(Li,Al)3Al6[(OH)4];
б) Сингония: тригональная;
в) Цвет: розовый, красный, тёмно-красный;
г) Цвет черты: белый;
д) Блеск: стеклянный;
е) Твёрдость: 7-7,5;
ж) Спайность: отсутствует;
з) Плотность: 2,90-3,26 г/см3.

Подобно другим разновидностям, кристаллизуется в тригональной сингонии. Кристаллы столбчатые или игольчатые, часто радиально-лучистые сростки. Образуется в пегматитах. Ассоциирует с сиреневым силикатом лития и алюминия, кунцитом, лепидолитом, кварцем и др.

Месторождения Рубеллита

На территории России рубеллиты были обнаружены на копях Среднего Урала и Восточного Забайкалья. Месторождения рубеллитов известны в Калифорнии, на Цейлоне и Мадагаскаре. Наиболее крупные кристаллы рубеллита были обнаружены в Бразилии; сросток кристаллов общей массой около 4 т, крупнейший из которых достигал 40 см в длину, и отдельный кристалл размером 100×40 см, считающийся самым крупным в мире. Стоимость таких кристаллов доходит до нескольких миллионов долларов. В Казахстане отмечен в редкометалльных пегматитах (Калба).

Лечебные свойства Рубеллита

Так как рубеллит является разновидностью турмалина, то и лечебные свойства у него такие же. Считается, что рубеллит малинового цвета способствует активизации деятельности желез внутренней секреции. Некоторые литотерапевты предполагают, что такие минералы укрепляют память, улучшают цвет кожи, а также являются профилактическим средством от кишечных и желудочных заболеваний. Розовые рубеллиты, по мнению народных целителей, благодаря своему цвету могут снимать нервное напряжение, нормализовать сон, избавлять от ночных кошмаров.

Магические свойства Рубеллита

Рубеллит ювелирный драгоценный каменьМагические свойства рубеллита хорошо известны современным практикующим магам. Этот камень, как и многие другие минералы розового цвета, олицетворяет любовь, талант и чистое сердце. Рубеллит лучше всего носить в изделиях. Золотой кулон с рубеллитом является прекрасным амулетом, помогающим своему хозяину обрести уверенность в себе, раскрыть неизвестные таланты, развить уже существующие. Кольцо или перстень с рубеллитом нужно носить на среднем или указательном пальце левой руки, тогда он помогает обрести счастье в личной жизни, гармонизировать семейные отношения.

Знатоки мистических свойств камней верят, что турмалины обладают проективной энергией Ян. Эти камни благотворно влияют на тело и разум человека, помогают бороться с тревогами и страхами. Рубеллит покровительствует людям, родившимся под знаком Весов. Женщинам Весам этот камень поможет обрести семейное счастье, сделает дом привлекательным для друзей, создаст атмосферу добра и радости. Мужчинам Весам кольцо или перстень с рубеллитом придаст мужества, поможет правильно разбираться в непростых ситуациях, избавит от неуверенности в себе.

Талисманы и амулеты из Рубеллита

В качестве талисмана или амулета лучше всего, как уже говорилось, использовать изделия из рубеллита, оправленного в золото или серебро. Этот камень – талисман художников. Им он помогает увеличить силу таланта, приносит успех и признание.

Факты из истории Рубеллита

В качестве примера изделий можно упомянуть великолепный розовато-малиновый рубеллит массой около 255 карат и размером 23x27x40 мм, подаренный шведским королём Густавом III русской императрице Екатерине II в 1777 г. и ныне хранящийся в Алмазном фонде СССР; камень обработан в виде виноградной грозди, добыт, видимо, в Бирме. Рубеллит считался талисманом художников, дающим признание и возбуждающим творческие силы.

Rubellite stone Facts, Information Description and Properties

The red gemstone known as Rubellite is a particularly striking gemstone from the colorful family of the tourmalines. Its vivid color ranges from a deep purplish pink to purplish-red, and it is well-known for maintaining its color under different lighting. Not every pink or red tourmaline deserves to be called Rubellite, only the most saturated and vivid colors are given this name.

The prices and value of Rubellite vary depending on the size and quality of the individual gemstone. Color is the most important determinant of value, with the most saturated and redder colors being the most valuable. Since most Rubellites are significantly included, eye clean stones are especially valuable. Rubellites over 10 carats are much sought after by collectors and investors.

Attributes of Rubellite

Рубеллит ювелирный драгоценный каменьRubellite tourmaline gemstones are well suited for wearing and are uncomplicated to care for, since all tourmalines have a hardness of 7 to 7.5 on the Mohs’ scale. Its lustre is vitreous, it ranges from transparent to translucent, and is doubly refractive. Its cleavage is perfect on the basal plane, breaking with uneven fractures.

Rubellite Tourmaline has a specific gravity of 3.06, a refractive index of 1.624-1.644, and birefringence of 0.020. The refractive index (RI), measured using a refractometer, is an indication of the amount light rays are bent by a mineral. Birefringence is the difference between the minimum and maximum RI. When birefringence is high, light rays reflect off different parts of the back of a stone causing an apparent doubling of the back facets when viewed through the front facet.

Most gems have a crystalline structure. Crystals have planes of symmetry and are divided into seven symmetry systems. The number of axes, their length, and their angle to each other determine the system to which a crystal belongs. Rubellite Tourmaline belongs to the trigonal crystal system and occurs as long, slender to thick prismatic and columnar crystals that are usually triangular in cross-section. Interestingly, the style of termination at the ends of crystals is asymmetrical, called hemimorphism. Small slender prismatic crystals are common in a fine-grained granite called aplite, often forming radial daisy-like patterns. Tourmaline is distinguished by its three-sided prisms; no other common mineral has three sides. Prisms faces often have heavy vertical striations that produce a rounded triangular effect. Tourmaline is rarely perfectly euhedral. An exception was the fine dravite tourmalines of Yinnietharra, in western Australia. The deposit was discovered in the 1970s, but is now exhausted.

Rubellite Tourmaline has another feature that attracted the attention of scientists since ancient times.The philosopher Theophrastus wrote 23 centuries ago that «lyngourion», probably the mineral tourmaline, had the property of attracting straws and bits of wood. This effect, called pyroelectricity, occurs when the crystal is heated, causing it to yield a positive charge at one end of the crystal and a negative charge at the other and attract light weight substances. This is why tourmaline was called «asshentrekers» or ash drawers by the Dutch during the eighteenth century. An electrical charge can also be induced in some tourmaline crystals simply by applying pressure to the crystal in the direction of the vertical crystal axis.This effect is known as piezoelectricity, and found many uses in pressure measuring equipment and other scientific applications: Tourmaline was used in the production of pressure sensitive gauges for submarine instrumentation as well as other war equipment. The pressure gauges that measured the power of the first atomic bomb blasts were made with slices of this gem.

Almost all gem tourmaline is of the Elbaite variety. Elbaite also contains the appealing multicolored crystals. Fine crystals are very expensive, as they make beautiful specimens. They are one of the most prized minerals to a collector. The varieties Schorl and Dravite are usually opaque and have little gem value. Both are common and not particularly interesting. In the past, mourning jewelry was carved out of black Schorl. The other forms of tourmaline (Liddicoatite, Uvite, Chromdravite, and Buergerite), are very rare and are only appreciated by serious mineral collectors.

Color of Rubellite

Tourmaline is a gemstone noted for the large and unsurpassed range of colors in which it occurs, and rubellite tourmalines. Even among rubellite tourmalines there is a wide range of color. Some of them are very light, others are so dark that the red hue can only be recognized when the stone is held against the light. There are rubellite tourmalines in fine red hues, but also in pinkish and violetish nuances.

According to an ancient Egyptian legend, tourmaline’s variety of colors is the result of the fact that on the long way from the Earth’s heart up towards the sun, tourmaline gems traveled along a rainbow and on its way it collected all the colors of the rainbow. This is why nowadays tourmaline is called the «Rainbow gemstone». The word «rainbow» is used figuratively to describe tourmaline stones. In reality, it is a well recognized fact that tourmaline’s diversity in color is not limited to the seven colors of the rainbow. Loose Tourmaline can be colorless to just about any color, hue, or tone known to man, even individual crystals of rubellite tourmaline can vary in color along their length or in cross-section. The variations in color along a crystal’s length give rise to the bi-color and tri-color rubellite tourmalines. The variation in color in cross section can be concentric, as in the case of watermelon tourmaline, a pink tourmaline core surrounded by a green rind. In fact, tourmaline crystals showing one red color only are quite rare. Generally one and the same crystal displays several shades and colors.

Not only a wide range of colors characterizes this gemstone, rubelite tourmaline also shows a remarkable dichroism. Depending on the angle of view of a rubellite tourmaline stone, the color will be different or at least show different intensity. The deepest color always appears along the main axis, a fact that the cutter of loose rubellite tourmaline has to keep in mind when cutting a rubellite tourmaline stone.

Tourmaline is seperated into several varieties, based on color:

  • Elbaite — green variety of tourmaline (may also refer to multicolored tourmaline).
  • Rubellite — pink to red variety of tourmaline.
  • Indicolite or Indigolite — light to dark blue variety of tourmaline.
  • Dravite — brown variety of tourmaline.
  • Achroite — colorless variety of tourmaline.
  • Schorl — black variety of tourmaline.
  • Watermelon tourmaline — tourmaline with a red center, surrounded by a green layer (or vice versa).
  • Verdelite — name rarely used to describe green tourmaline.
  • Siberite — purple variety of tourmaline.
  • Paraiba tourmaline — neon-blue or green variety of tourmaline, colored by copper.

Tourmaline is found in elongated crystals that are most economically cut in the long rectangular shape, but rubellite tourmaline gems are also commonly found as cushions, ovals, rounds, emerald cuts, and occasionally trillion or other fancy shapes (including pears, briolettes, hearts and marquises). Fine rubellite tourmaline crystals that command the highest prices per carat are usually cut into more conservative emerald cuts, ovals, and cushions.

Pink and green tourmaline gemstones from certain localities contain tiny, parallel tubular inclusions, causing them to display a strong cat’s eye effect when polished. Cat’s eye tourmalines are cut into the cabochon shape in order to develop and properly display the cat’s eye effect.

Treatments Rubellite

Some tourmaline gems, especially pink to red colored stones, are altered by irradiation to improve their color. Irradiation is almost impossible to detect in tourmalines and will negatively impact their value. Heavily-included tourmalines, such as rubellite and Brazilian paraiba are sometimes clarity enhanced. A clarity-enhanced tourmaline (especially paraiba) is worth much less than a non-treated gem.

Heat treatment can enhance the color of some tourmalines. Some dark greenish stones can be made deep emerald green, some brownish-red stones can be made red or pink and some light pink tourmaline gemstones can be made colorless through heating. The color of many darker stones can be lightened.

Sources of Rubellite

Tourmaline was first introduced into Europe from India in 1703, and its name is adapted from «tura mali», its Sinhalese name. Tourmaline is a widely distributed mineral, and its transparent colored varieties, used as gem stones, have attained a considerable popularity. The vogue of the tourmaline has increased since it was discovered in 1820 on Mount Mica near Paris, Maine. The tourmaline has also been found in Massachusetts, California, and New York State. Its principal sources are Ceylon, Burma, Brazil, and the Ural Mountains, Siberia; it is also found in Moravia, Sweden, and the Isle of Elba. Tourmaline occurs in granite, particularly the albitic varieties, schists, and dolomite.

Tourmaline gems have been found throughout history in Africa, the Ural Mountains and other European locations, but some of the most exciting finds have been established in North and South America.

Brazil

Some of the finest Tourmaline in the world is found in igneous rock pegmatite dikes and alluvial deposits or cascalho, located in the area around Virgem da Lapa in Minas Gerais, Brazil. Rivers have washed through these deposits scattering stones throughout this region. Some of the mines that have produced the greatest specimens of gem crystal tourmaline and aquamarine are the primary deposits of Araua, Corrego do Urucum, Cruzeiro, Golconda, Jonas, Limoeiro, Medina, Pedra Azul and Xanda.

Almost every color of tourmaline can be found in Brazil, especially in the Brazilian states of Minas Gerais and Bahia. In 1989, miners discovered a unique and brightly colored variety of tourmaline in the state of Paraiba. The new type of tourmaline, which soon became known as paraiba tourmaline, came in unusually vivid blues and greens. These colors were often described as «neon» since they appeared to glow. Brazilian paraiba tourmaline is usually heavily included. Much of the paraiba tourmaline from Brazil actually comes from the neighboring state of Rio Grande do Norte. Material from Rio Grande do Norte is often somewhat less intense in color, but many fine gems are found there. It was determined that the element copper was important in the coloration of the stone. The demand and excitement for this new material, which has fetched more than $50,000 per carat, earned more respect for the other colors of tourmaline.

United States of America

Some fine tourmaline material has been produced in the US, with the first discoveries having been made in 1822, in the state of Maine. California became a large producer of loose tourmaline in the early 1900s. The Maine deposits tend to produce tourmaline crystals in raspberry pink-red as well as minty greens. The California tourmaline deposits are known for bright pinks, as well as interesting bicolors. During the early 1900s, Maine and California were the worlds largest producers of gem tourmalines.

The principal source of the best American tourmalines is a mine on Mount Mica at Paris, Maine. Gem tourmalines were discovered on Mount Mica on an autumn day in 1820 by two boys, Elijah L. Hamlin and Ezekiel Holmes, amateur mineralogists. When nearing home from a fatiguing local prospecting expedition, they discovered some gleaming green substance at the root of a tree, and investigation rewarded them with a fine green tourmaline. A snowstorm prevented a further search, but the following spring they returned to their «claim» and secured a number of fine crystals. Tourmalines from Mount Mica are found in pockets in pegmatitic granite, overlaid by mica schist, which has since to some extent been stripped off to facilitate this interesting mineral industry. Black tourmaline, muscovite, and lepidolite are found in this Pine Tree State treasure house. Tourmalines from this source have included many specimens of rare beauty that have enriched the collections of royalty, wealthy private connoisseurs of precious stones, and of great public museums and educational institutions.

In 1972, the Dutton Mine in Newry, Maine established itself as one of the largest finds on record ever, and for a brief period of time became a world-source of superior quality red and green tourmaline.

In the 1860’s, the first expeditions looking for gem and mineral resources into California’s Riverside and San Diego Counties led to the discovery of fine pink tourmaline in the San Diego County. This discovery coincided with the reign of this gem’s greatest enthusiast in history: Most of the pink tourmaline that was mined at the Stewart Mine went to the Empress Tzu Hsi of the Ch’ing Dynasty and her entourage, who purchased everything they could get and had it exported to China. The California tourmaline boom ended in 1911 with the death of the Dowager Empress. World War I marked an end to tourmaline mining in the San Diego area until the seventies.

Africa

In the late 90s, copper-containing tourmaline was found in Nigeria. The material was generally paler and less saturated than the Brazilian materials, although the material generally was much less included. A more recent African discovery from Mozambique has also produced beautiful tourmaline colored by copper, similar to the Brazilian paraiba. Mozambique paraiba is often less included and has been found in larger sizes. The Mozambique paraiba material usually is more intensely colored than the Nigerian. There is a significant overlap in color and clarity with Mozambique paraiba and Brazilian paraiba, especially with the material from Rio Grande do Norte. While less expensive than top quality Brazilian paraiba, some Mozambique material sells for well over $5,000 per carat, which still is extremely high compared to other tourmalines.

Another unique variety that is also highly valued is chrome tourmaline, a rare type of dravite tourmaline from Tanzania which occurs in a very rich green color caused by chromium, the same element which causes the green in emerald.

Mythology of Rubellite

The name tourmaline comes from a Sinhalese word, «tura mali», meaning «mixed colored stones» and was originally applied to an assortment of colored stones consisting mainly of zircons.

The Empress Dowager Tz’u Hsi, the last Empress of China, loved pink tourmaline and bought large quantities for gemstones and carvings from the then new Himalaya Mine, located in San Diego County, California. The Himalaya Mine is still producing tourmaline today but the Dowager went to rest eternally on a carved tourmaline pillow.

The ability of tourmaline to look like other gemstones led to some confusions. Many gemstones in the Russian Crown jewels from the 17th Century once thought to be rubies are in fact rubellite tourmalines. In South America, where the majority of such gem-quality material is found, green tourmaline is still referred to as the «Brazilian emerald». The quantity of such green stones which were mined in the early days of the Portuguese colonization and sent to Portugal as emerald will probably never be known.

The folk-lore of tourmaline tells us that both the introduction of this beautiful and multiphase mineral to the knowledge and appreciation of mankind, and its discovery in America, were due to children. Soon after the year 1700, some children in Holland were playing in a court-yard on a summer day with a few bright-colored stones indifferently given to them by some lapidaries, who evidently had not classified, or invested them with any particular value or significance. The children’s keenness of observation revealed that when their bright playthings became heated by the sun’s rays, they attracted and held ashes and straws. The children appealed to their parents for enlightenment as to the cause of this mysterious property; but they were unable to explain or to identify the stones, giving them, however, the name of aschentreckers or ash-drawers, which for a long time clung to these tourmalines.

Elbaite is named for the Island of Elba, Italy, where many fine specimens were found, including the famous «Moor’s Head Tourmaline».

Tourmaline gemstones are credited with the power to enhance one’s understanding, increase self-confidence and amplify one’s psychic energies, and aid in concentration and communication. Conversely, they are said to neutralize negative energies, and dispel fear and grief.

Tourmalines were believed to be useful in relaxing the body and the mind, and to help in the treatment of many different diseases such as anxiety, blood poisoning, arthritis, and heart disease.

Pink Tourmaline is said to inspire love, spirituality and creativity, and to give wisdom and enhance one’s willpower. Watermelon Tourmaline is said to be very effective in helping one to recover from emotional problems. Tourmaline is the birthstone for October and corresponds to the astrological sign of the Libra.

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