You are here: / Crystal Encyclopedia

Crystal Encyclopedia

Cavansite

/0 Comments/in /by
Cavansite is a relatively rare and striking mineral known for its vibrant blue color. The name “cavansite” is derived from its chemical composition, as it contains calcium (Ca), vanadium (V), and silicon (Si). The mineral is typically found in crystal form, often in association with other minerals such as stilbite or heulandite. One of the […]

Sillimanite

/0 Comments/in /by
Sillimanite is a mineral that belongs to the group of aluminosilicate minerals known as the sillimanite group. It is named after the American chemist Benjamin Silliman Jr., who first described the mineral in 1854. Sillimanite has the chemical formula Al₂SiO₅ and is composed mainly of aluminum, silicon, and oxygen. Sillimanite typically occurs in metamorphic rocks, […]

Kaolinite

/0 Comments/in /by
Kaolinite Mineral Rock Kaolinite sample from Twiggs County, Georgia, USA. This sample is from the Cretaceous rocks of Georgia Kaolinite is a clay mineral with chemical composition Al2Si2O5(OH)4. It is an important industrial mineral. Rocks rich in kaolinite are called kaolin. Kaolinite, common group of clay minerals that are hydrated aluminum silicates; they contain the […]

Zircon

/0 Comments/in /by
Zircon, scientifically known as zirconium silicate (ZrSiO4), is a mineral prized for its versatility and wide-ranging applications. With its remarkable resistance to heat, corrosion, and chemical alteration, zircon finds use in diverse industries. Gem-quality zircons, known for their brilliant luster and dispersion, are sought after in the jewelry market, coming in various colors, including blue […]

Lazurite

/0 Comments/in /by
Lazurite, pyrite, calcite Lazurite is a member of sodalite group in feldspathoid mineral also it is tectosilicate with formula is (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)]. A sodium calcium aluminosilicate, lazurite is the main component of the gemstone lapis lazuli and accounts for the stone’s intense blue color, although lapis lazuli also typically contains pyrite, calcite, sodalite, and haüyne. Lazurite […]

Glaucophane

/0 Comments/in /by
The Glaucophane mineral is named after two Greek words: glaukos, which means “bluish green”; and phainesthai, which means “to appear.” Specimens can be gray, lavender blue, or bluish black. Crystals are slender, often lathlike prisms, with lengthwise striations. Twinning is common. Glaucophane can also be massive, fibrous, or granular. When iron replaces the magnesium in […]

Aquamarine

/0 Comments/in /by
Aquamarine is a beautiful gemstone and a variety of the mineral beryl. It is highly prized for its stunning blue to greenish-blue color, reminiscent of the clear waters of the sea, which gives it its name “aquamarine” (aqua meaning water and marine meaning sea). Aquamarine is a popular gemstone used in jewelry and is also […]