What mineral group does magnesite belong to?
What mineral group does magnesite belong to?
calcite group
magnesite, the mineral magnesium carbonate (MgCO3), a member of the calcite group of carbonate minerals that is a principal source of magnesium. The mineral has formed as an alteration product from magnesium-rich rocks or through the action of magnesium-containing solutions upon calcite.
What mineral Class is Topaz in?
Nesosilicate minerals
| Topaz | |
|---|---|
| Category | Nesosilicate minerals |
| Formula (repeating unit) | Al2SiO4(F,OH)2 |
| Strunz classification | 9.AF.35 |
| Crystal system | Orthorhombic |
What crystal system is Topaz?
Orthorhombic crystal system
Topaz/Crystal system
What type of rock is magnesite?
Sedimentary Rock
Magnesite as a Sedimentary Rock–Type I. Carbonate of magnesia occurs as a sedimentary rock at Atlin, B.C., and in Kern Co., California.
Is magnesite a sedimentary rock?
Magnesite is a magnesium carbonate mineral (MgCO3). Unlike related carbonates calcite (CaCO3) and dolomite (CaMg(CO3)2), it is not a major rock-forming mineral. It most commonly occurs in metamorphosed igneous rocks which are rich in magnesium. It also occurs in hydrothermal veins and in sedimentary rocks.
Is Topaz a rock or mineral?
silicate mineral
topaz, silicate mineral that is valued as a gemstone. It is believed that the topaz of modern mineralogists was unknown to the ancients and that the stone called topazos was the mineral chrysolite or peridot. The “topaz” in the Old Testament also may have been chrysolite.
Is Topaz a metamorphic rock?
Topaz occurs in metamorphic rocks by fluorine metasomatism in greisens and quartzites associated with fluorite, zinnwaldite, corundum and rutile. It also occurs (rarely) in schists. Topaz appears in hypothermal ore deposits associated with cassiterite, hematite, wolframite and gold.
Is blue topaz a mineral?
Topaz is a well-known mineral, occurring in large and beautifully shaped and colored crystals. It naturally occurs in many colors, but rarely in pink, purple, and deep blue. Those colors are formed from lighter-colored stones that undergo irradiation and heat treatment.
Is Magnesite a gemstone?
Magnesite is a beautiful gemstone that looks similar to Turquoise or Howlite. When cut and polished into beads, it features a dark thread of veins or a web-like matrix across its surface, making it an attractive gem to use for jewelry-making projects.
Is magnesite an igneous rock?
Magnesite is a magnesium carbonate mineral (MgCO3). Unlike related carbonates calcite (CaCO3) and dolomite (CaMg(CO3)2), it is not a major rock-forming mineral. It most commonly occurs in metamorphosed igneous rocks which are rich in magnesium. These are ultramafic rocks like dunite, pyroxenite and peridotite.
Is magnesite A igneous rock?
What is the chemical composition of Topaz?
Topaz has a chemical composition of Al 2SiO 4(F,OH) 2. The fluorine in its composition is a limiting factor on its formation. Fluorine gas in concentrations high enough to form minerals only occurs in a few geologic environments.
What is the chemical name of the mineral magnesite?
Magnesite is a magnesium carbonate mineral with a chemical composition of MgCO 3. It is named after the presence of magnesium in its composition. Magnesite usually forms during the alteration of magnesium-rich rocks or carbonate rocks by metamorphism or chemical weathering. Magnesite is used to produce magnesium oxide (MgO),…
Can topaz crystals be found in a matrix?
Topaz crystals in a matrix are rare and very much desired, since the perfect basal cleavage of Topaz causes it to separate from its base and form loose crystals. Precautions must be taken not to damage specimens, for pressure or improper faceting can cause a crystal to cleave and become ruined.
Is magnesite a calcite?
Magnesite belongs to the calcite group of minerals, a group of related carbonates that are isomorphous with one another. They are similar in many physical properties, and may partially or fully replace one another, forming a solid solution series.
