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Mineral symbols (text abbreviations) are used to abbreviate mineral groups, subgroups, and species, just as lettered symbols are used for the chemical elements. The first set of commonly used mineral symbols was published in 1983 and covered the common rock-forming minerals using 192 two- or three-lettered symbols. [1]
The gem is a yellow-red to red-brown variety of zircon. Hyacinth (given name) Given name Masculine and feminine given name. Jade: Jade (given name) Given name Jasper: Jasper (given name) Given name Means bringer of treasure in Persian. Jet (gemstone) Jet (name) Given name / surname A mineraloid derived from wood. Jewellery, gemstone: Bijou ...
Menshikov Ruby, the world's second largest spinel set on top of the Great Imperial Crown of Russia; Timur Ruby, believed to be a ruby until 1851, hence its name; Black Prince's Ruby, the famous spinel mounted on the Imperial State Crown of the United Kingdom
Ekanite is an uncommon silicate mineral with chemical formula Ca 2 ThSi 8 O 20 or (Ca,Fe,Pb) 2 (Th,U)Si 8 O 20.It is a member of the steacyite group. It is among the few gemstones that are naturally radioactive.
Allanite crystals on smoky quartz from the White Mountain Wilderness, Lincoln County, New Mexico, USA (size: 2.7 × 1.8 × 1.7 cm) Allanite contains up to 20% rare-earth elements and is a valuable source of them. The inclusion of thorium and other radioactive elements in
Opal is a hydrated amorphous form of silica (SiO 2 ·nH 2 O); its water content may range from 3% to 21% by weight, but is usually between 6% and 10%. Due to the amorphous (chemical) physical structure, it is classified as a mineraloid , unlike crystalline forms of silica, which are considered minerals .
Element Origin of name [1] [2] Group Period Block Standard atomic weight A r °(E) [a] Density [b] [c] Melting point [d] Boiling point [e] Specific heat capacity [f] Electronegativity [g] ...
Taaffeite (/ ˈ t ɑː f aɪ t /; BeMgAl 4 O 8) is a mineral, named after its discoverer Richard Taaffe (1898–1967) who found the first sample, a cut and polished gem, in October 1945 in a jeweler's shop in Dublin, Ireland. [4] [5] As such, it is the only gemstone to have
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