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Tourmaline
The tourmaline mineral group is chemically one of the most complicated groups of silicate minerals. It is a complex silicate of aluminium and boron, but because of isomorphous replacement (solid solution) , its composition varies widely with sodium, calcium, iron, magnesium, lithium and other elements entering into the structure.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
K. K Collections a Group of Companies with some Precious & Sami Precious mine owner in AfghanistanWe can supply Rough / Cutted / Polished Lapis Lazuli of every quality in huge quantity.For sami precio
Aquamarine Lat. Aqua marina, water of the sea is a gemstone-quality transparent variety of beryl, having a delicate blue or turquoise color, suggestive of the tint of seawater. It`s closely related to
Aquamarine Lat. Aqua marina, water of the sea is a gemstone-quality transparent variety of beryl, having a delicate blue or turquoise color, suggestive of the tint of seawater. It`s closely related to
The name Lapis Lazuli comes from the Persian word lazhward meaning blue, in allusion to its color. In ancient times, lapis lazuli was known as sapphirus, which is the name that we use today for the bl
The name Lapis Lazuli comes from the Persian word lazhward meaning blue, in allusion to its color. In ancient times, lapis lazuli was known as sapphirus, which is the name that we use today for the bl
We Deal in Lapis Lazuli direct from Badakhshan AfghanistanWe have more than 6000 KG of Madan Quality available (10% Sami Precious)Calcite 10-20%Pyrite 10-15%Rate US $85 per Kgs Ex FOB Peshawar
We Deal in Lapis Lazuli direct from Badakhshan AfghanistanWe have more than 8000 KG of Jandaque Quality availableCalcite 25-35%Pyrite 30-40%Rate US $30 per Kgs Ex FOB Peshawar
Ruby is a red gemstone. Rubies can vary from a light pink to a blood red, a variety of the mineral corundum (aluminium oxide) . The color is caused mainly by chromium. Its name comes from ruber, Latin
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