Tremolite

Tremolite,Campolungo, Piumogna Valley, Switzerland Tremolite from Franklin, Sussex Co., New Jersey, United States Tremolite is a silicate mineral and member of the amphibole group. Chemical formula is Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)2.…

Anthophyllite

The name anthophyllite comes from the Latin word anthophyllum, which means “clove”—a reference to the mineral’s clove-brown to dark brown color. Specimens can also be pale green, gray, or white. Anthophyllite is usually found in columnar to fibrous…

Nepheline

Nepheline – USGS Mineral Specimens Nepheline is the most common feldspathoid mineral in the world, its name from the Greek word nephele, which means “cloud” a reference to the fact that the mineral becomes cloudy or milky in strong acids.…

Biotite

Biotite is the most common mica mineral and also known as black mica, a silicate mineral in the common mica group. Approximate chemical formula K (Mg, Fe). It can be found in massive crystal layers weighing several hundred pounds. It is abundant in metamorphic…

Mica Group Minerals

Muscovite schist_mica Mica Minerals Contents Mica Group Minerals Classification of Mica Group Minerals Dioctahedral micas Trioctahedral micas Occurrence of Mica Group Minerals Production Crystal Structure…

Anorthoclase

Anorthoclase minerals is member of the sodium- and potassium-rich feldspar group takes its name from the Greek word anorthos, which means “not straight”—a reference to its oblique cleavage. Anorthoclase is colorless, white, cream,…

Hornblende

Ferrohornblende Ferrohornblende Magnesio-hornblende Magnesio-hornblende Hornblende is a inosilicate amphibole minerals, which are two type hornblende minerals. They are ferrohornblende and magnesiohornblende. They are an isomorphous…

Perlite

Perlite is a naturally occurring volcanic glass that has been used in various industrial and horticultural applications. It is a unique mineral formed when obsidian, a type of volcanic rock, is exposed to high heat. The resulting perlite is a lightweight,…

Eosphorite

Eosphorite is a mineral belonging to the group of phosphates. It typically forms in pegmatite veins, which are coarse-grained igneous rocks found in association with granite. Eosphorite is known for its distinctive pink to purple coloration, often with…

Gypsum

Gypsum is a naturally occurring mineral that has been used by humans for various purposes for thousands of years. It is a versatile mineral with a wide range of applications in construction, agriculture, industry, and even art. In this introduction, we’ll…

Halite

Halite, also known as rock salt or sodium chloride (NaCl), is a naturally occurring mineral that holds significant importance in various aspects of human life. This crystalline mineral is composed of equal parts sodium and chlorine ions and is renowned…

Vermiculite

Vermiculite is a naturally occurring mineral that has gained significant attention due to its unique properties and various applications. It is a hydrated, laminar, and micaceous mineral belonging to the phyllosilicate group. Vermiculite has a layered…