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 […]
About DonghaiCrystal
This author has not written his bio yet.
But we are proud to say that DonghaiCrystal contributed 1597 entries already.
Entries by DonghaiCrystal
Aquamarine
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 […]
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 […]
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 Properties of Mica Group Minerals Uses […]
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 […]
Natrolite
Haineaultite-Analcime-Natrolite Bombay Quarry, Mumbai District (Bombay District), Maharashtra, India Natrolite is a tectosilicate mineral belong to zeolite group members.Its formula Na2Al2Si3O10 • 2H2O. A hydrated sodium aluminosilicate, natrolite takes its […]
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 mixture of three molecules; a […]
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, […]
Pyromorphite
Pyromorphite is a secondary lead mineral that forms in the oxidation zones of lead ore deposits. It is classified as a member of the apatite group of phosphates and has […]
Aragonite
Aragonite crystals. Aragonite is a variant of calcium carbonate, along with the mineral calcite. This sample, found in Morocco, is 4 centimetres long. crystals of Aragonite mineral stone isolated on […]
Cacoxenite
Cacoxenite is a mineral that is primarily composed of iron, aluminum, phosphate, and hydroxide ions. It is a relatively rare mineral and is often found as an accessory mineral in […]
Ilmenite
Ilmenite an outstanding tabular group of large parallel-growth crystals Ilmenite-magnetite by James St. John (Flickr.com) Ilmenite, otherwise called manaccanite, is a titanium-iron oxide mineral with formula: FeTiO3. It is a […]
Crystal Research Institute
The world’s largest independent crystal grading and certification service provider
Crystal Academy Institute
ICIA Secretary Bureau
11/F, No. 28 Austin Avenue, Kowloon, Hong Kong, China.
Email: service@donghaicrystal.org
Email: service@donghaicrystal.org