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Crystal Encyclopedia

Tiger’s Eye

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Tiger’s Eye is a mineral gemstone that belongs to the quartz family. It is composed primarily of silicon dioxide (SiO2), the same chemical composition as other varieties of quartz such as amethyst and citrine. What sets Tiger’s Eye apart is its unique optical phenomenon known as chatoyancy. Chatoyancy, also referred to as the cat’s eye […]

Amber Overview

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Amber is a fascinating organic gemstone that has captured human fascination for millennia. It’s not a mineral, but rather a fossilized resin from ancient trees. This unique material has played a significant role in various cultures and has been used for both decorative and practical purposes. Amber is a solidified resin that originated from coniferous […]

Andalusite

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Andalusite is a mineral that holds significant importance due to its unique crystal structure, distinctive physical properties, and its utilization in various industrial applications. It belongs to the aluminosilicate mineral group and is characterized by its remarkable thermal stability, making it an essential component in refractory materials used in high-temperature environments. Its name is derived […]

Diopside

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Aliabad, Hunza Valley, Gilgit District, Gilgit-Baltistan (Northern Areas), Pakistan Diopside is a member of pyroxene group mineral with formula is MgCaSi2O6. Specimens can be colorless but are more often bottle green, brownish green, or light green in color.  It has two distinct prismatic cleavages at 87 and 93° typical of the pyroxene series. Diopside occurs […]

Sapphire

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Sapphire is a precious gemstone that is a variety of the mineral corundum, which is composed of aluminum oxide. It is typically blue in color, but can also be found in other hues such as yellow, pink, purple, green, and colorless. The blue color of sapphire is due to the presence of trace amounts of […]

Spinel

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Spinel is a mineral that belongs to the group of oxides and forms in various colors, making it a popular gemstone. Its chemical composition is magnesium aluminum oxide (MgAl2O4). Spinel crystals have an octahedral crystal structure and are often found as octahedral, rounded grains or as single crystals. Spinel octahedron from Morogoro, Tanzania. This red […]

Kyanite

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Kyanite is a mineral composed of aluminum silicate, and it belongs to the family of aluminosilicate minerals. Its chemical formula is Al2SiO5. Kyanite typically forms bladed crystals, and its name is derived from the Greek word “kuanos,” meaning blue, which reflects its most common blue coloration. Name: From the Greek for blue, in allusion to […]