Other valuable stones, the topaz, chrysolite, aquamarine amethyst and tourmaline are found.
Zircon, tourmaline, garnet and other precious stones of little commercial value are found throughout Australia.
The granite, which is intruded through the Eocene beds, is associated with a pegmatite containing tourmaline and cassiterite.
mica, talc, chlorite, haematite), or in long blades or fibres (anthophyllite, tremolite, actinolite, tourmaline), and, when these have a well marked parallel arrangement in definite bands or folia, the rock will break far more easily along the bands than across them.
garnet, tourmaline, staurolite, andalusite, actinolite, chloritoid or ottrelite, epidote, haematite, and if any of these is abundant its presence may be indicated by the name given the rock, e.g.
Flattened crystals of garnet, films of quartz, and needles of tourmaline are not uncommon.
These veins consist of felspar, quartz and mica, often with smaller amounts of other crystallized minerals, such as tourmaline, beryl and garnet; they are worked for mica in India, the United States (South Dakota, Colorado and Alabama), and Brazil (Goyaz, Bahia and Minas Geraes).
Throughout the world, primary deposits of tinstone are in or closely connected with granite or acid eruptive rocks of the same type, its mineral associates being tourmaline, fluorspar, topaz, wolfram and arsenical pyrites, and the invariable gangue being quartz: the only exception to this mode of occurrence is to be found in Bolivia, where the tin ore occurs intimately associated with silver ores, bismuth ores and various sulphides, whilst the gangue includes barytes and certain carbonates.
Tourmaline or rubellite is found on the borders of the Ruby Mines district and in the Shan State of Mong Long.
In other cases, especially near mineral veins, slates are filled with black needles of tourmaline or are bleached to pale grey and white colours, or are silicified and impregnated with mineral ores.
In blue tourmaline and in iolite - stones sometimes mistaken for sapphire - the dichroism is much more distinct.
Sapphires are also found in Kashmir, where they occur, associated with tourmaline, in the Zanskar range, especially near the village of Soomjam.
Under all these three conditions the diamond is associated with fragments of the rocks of the country and the minerals derived from them, 'especially quartz, hornstone, jasper, the polymorphous oxide of titanium (rutile, anatase and brookite), oxides and hydrates of iron (magnetite, ilmenite, haematite, limonite), oxide of tin, iron pyrites, tourmaline, garnet, xenotime, monazite, kyanite, diaspore, sphene, topaz, and several phosphates, and also gold.
Among the commonest associates of the diamond are quartz, topaz, tourmaline, rutile, zircon, magnetite, garnet, spinel and other minerals which are common accessory constituents of granite, gneiss and the crystalline schists.
It is possible that the lyncurium of the ancients, which according to Theophrastus attracted light bodies, was tourmaline, a mineral found in Ceylon, which had been christened by the Dutch with the name of aschentrikker, or the attractor of ashes.
Giovanni Caraffa, duca di Noja (1715-1768), was led in 1758 to purchase some of the stones called tourmaline in Holland, and, assisted by L.
Hitherto nothing had been said respecting the necessity of heat to excite the tourmaline; but it was shown by Aepinus that a temperature between 992° and 212° Fahr.
He found that the electricity of the tourmaline decreased rapidly from the summits or poles towards the middle of the crystal, where it was imperceptible; and he discovered that if a tourmaline is broken into any number of fragments, each fragment, when excited, has two opposite poles.
He also found that the polarity which minerals receive from heat has a relation to the secondary forms of their crystals - the tourmaline, for example, having its resinous pole at the summit of the crystal which has three faces.
In the other pyro-electric crystals above mentioned, Hatly detected the same deviation from the rules of symmetry in their secondary crystals which occurs in tourmaline.
He also made many experiments with the tourmaline when cut into thin slices, and reduced to the finest powder, in which state each particle preserved its pyro-electricity; and he showed that scolezite and mesolite, even when deprived of their water of crystallization and reduced to powder, retain their property of becoming electrical by heat.
In Oxford county tourmaline, spodumene (or kunzite) and beryl occur, the tourmaline crystals being notably large and beautiful.
Many semi-precious and precious stones are found in Utah, including garnet (long sold to tourists by the Navaho Indians), amethyst, jasper, topaz, tourmaline, opal, variscite (or " Utahlite "), malachite, diopside and Smithsonite.
By adding an alcoholic solution of iodine to a solution of the sulphate in acetic acid a compound known as herapathite, 4Qu 3H 2 SO 4.2HI Ie6H 2 O, is obtained, which possesses optical properties similar to those of tourmaline; it is soluble in Iwo parts of boiling water; and its sparing solubility in cold alcohol has been utilized for estimating quinine quantitatively.
The following precious stones are reported: corundum (rubies and sapphires), beryl, topaz, zircon, garnet, amazon-stone, tourmaline, often in large crystals, and variously coloured quartz, also often found in crystals of great size.
The polarizing action of such crystals is due to the unequal absorption that they exert on polarized streams. Thus a plate of tourmaline of from I mm.
These sediments are fine and tenacious; their principal components, in addition to clay, being small grains of quartz, zircon, tourmaline, hornblende, felspar and iron compounds.
in diameter), with often felspar, tourmaline, zircon, epidote, rutile and more or less calcite.
It consists of very fine scaly kaolin, larger, shining plates of white mica, grains of quartz and particles of semi-decomposed felspar, tourmaline, zircon and other minerals, which originally formed part of the granite.
This rock has pre and contemporaneous pegmatites containing muscovite and tourmaline.
You must wish to wear or carry rose quartz, rebellitc tourmaline, lavender, jade or chrysoprase.
Set in 18ct. white gold are diamonds, pink tourmaline, yellow sapphire, blue topaz and tanzanite!
tourmaline used is a premium grade crystal from Brazil.
Square shaped silver earrings set with pink tourmaline and 18ct gold beads 19.
Place one black tourmaline on the base chakra and tape another to where the spine meets the back of the skull at the occiput.
black tourmaline is awesome for grounding you and bringing you back into your body.
tourmaline crystal gives off far-infrared rays, these rays are beneficial to health and generate warmth in the feet.
tourmaline deposits from southern Kenya and Tanzania are also briefly described.
Tourmaline source: tourmaline source: Tourmaline (semi precious) stone Tourmaline is a very popular gemstone and collectors mineral.
Other precious stones found in Brazil are the topaz, ruby, aquamarine, tourmaline, chrysoberyl, garnet and amethyst.
Hitherto nothing had been said respecting the necessity of heat to excite the tourmaline; but it was shown by Aepinus that a temperature between 992Ã‚° and 212Ã‚° Fahr.
Set in 18ct. white gold are diamonds, pink tourmaline, yellow sapphire, blue topaz and tanzanite !
The Tourmaline used is a premium grade crystal from Brazil.
Black tourmaline is awesome for grounding you and bringing you back into your body.
Tourmaline crystal gives off far-infrared rays, these rays are beneficial to health and generate warmth in the feet.
For comparison, several other yellow tourmaline deposits from southern Kenya and Tanzania are also briefly described.
Tourmaline Source: Tourmaline (semi precious) stone Tourmaline is a very popular gemstone and collectors mineral.
October - Opal is the birthstone for the month of October, with tourmaline the alternate.
Many pink gemstone rings are made from tourmaline, pink sapphire, pink topaz or kunzite.
Pink tourmaline can vary in color between almost deep red to a very soft pink.
Egyptian legend believed that tourmaline came in a wide variety of colors because during its ascent from the center of the earth it passed over a rainbow and took on all the colors of the rainbow.
Today, tourmaline is often called the "gemstone of the rainbow" for this reason.
Tourmaline has a hardness of 7.5 on the Moh's scale and is found in Africa, Madagascar, Brazil, United States of America, Mexico, Myanmar and Sri Lanka.
For more information on this gem, you may want to read The Tourmaline Group by Richard Dietrech.
Because opals are somewhat fragile many with October birthdays choose to wear tourmaline, which is a deep pink jewel, or another pink stone instead.
Their half carat pink tourmaline ring comes in 14K gold.
The company also offers a pink sapphire and diamond ring, and a pink tourmaline and diamond ring.
Tourmaline: Multi-hued shades that strengthen the body and spirit.
Tourmaline: This gem, shaded and swirled with pink and green, is believed to be extremely powerful.
Delicate heart shaped Baby Coeur earrings are created in tourmaline, onyx, ruby, clear and a unique combination of 18 karat gold and clear crystal.
The Sedu straightening iron uses ceramic tourmaline plates combined with infrared radiation in order to achieve a frizz free effect without breaking the hair.
Some faithful tourmaline heat styling product users have indeed remarked that the overall health of their hair has been affected by frequent use of even the ceramic plate flat irons.
If you must blow-dry your hair, use a tourmaline hair dryer on a low setting to avoid excessively drying out your hair.
Sedu flat irons offer the latest in ceramic and tourmaline technology to help style your hair without incurring the damage caused by most heat styling equipment.
Yet, unless you're equipped with the best tourmaline heat styling products, it won't take many months for your locks to develop split ends and extensive breakage, especially if you color your hair.
Heating elements are supercharged to withstand daily use, ceramic tourmaline or enamel plates smooth without sacrificing the integrity of the hair, and everyday styling time is reduced in half.
Most people who have worked with modern straightening irons such as the tourmaline plated Sedus, however, consider the process well worth the extra effort.
Made with ceramic and tourmaline plates, the Sedu iron glides smoothly and easily over the hair.
This very light tool has an one inch styling plate made out of mineral crystal infused with tourmaline particles and ceramic particles that give your hair a silky look and feel because it seals in your hair's natural moisture and oils.
Tourmaline technology has been a huge step up from the days of ordinary metal plate straighteners.
Rubies, pink tourmaline, and pink sapphires are the most popular choices, though synthetic pink stones are also available.
Tanzanite, aquamarine, rubies, peridot, onyx, pearls, and pink tourmaline are also popular choices, giving couples the opportunity to have more unique designs than classic diamonds.
Some alternative stones include both blue and pink sapphires, emeralds, peridot, aquamarine, rubies, amethyst, garnet, tanzanite, pink tourmaline, and pearls.
Semi-precious gemstones with bright yellow colors include yellow sapphires, citrine, tourmaline, topaz, and cubic zirconia.
Rubies, pink sapphires, and pink tourmaline are all available in a range of shades from pale rose to vivid magenta.
However, because these tools are crafted from the finest materials, including ceramic and tourmaline elements, their prices are often outside many savvy shoppers' beauty budgets: a good Sedu iron or dryer can cost from $150 to $200 or more.
If you'd like to combine om with gemstones, consider this tourmaline and om pendant from Savatrii.
The om pendant is sterling silver, and the necklace is a ring of luxurious tourmaline stones.
Other minerals which occur in the rocks of this group are calcite, garnet, biotite, chloritoid, epidote, tourmaline and graphite or dark carbonaceous materials.
four series of "Researches on Heat," in the course of which he described the polarization of heat by tourmaline, by transmission through a bundle of thin mica plates inclined to the transmitted ray, and by reflection from the multiplied surfaces of a pile of mica plates placed at the polarizing angle, and also its circular polarization by two internal reflections in rhombs of rock-salt.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.