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Gemology or
gemmology is the
science dealing with
natural and
artificial gemstone materials. It is a
specific interdisciplinary branch of mineralogy. Some...
- An
asterism (from
Ancient Gr**** ἀστήρ (astḗr) 'star' and -ism) is a star-shaped
concentration of
light reflected or
refracted from a gemstone. It can appear...
- California. It is
dedicated to
research and
education in the
field of
gemology and the
jewelry arts.
Founded in 1931, GIA's
mission is to
protect buyers...
- "Identification of
extraterrestrial peridot by
trace elements". Gems &
Gemology. 47 (3): 208–213. doi:10.5741/GEMS.47.3.208. "St. John's
Island peridot...
- Gems &
Gemology is a
quarterly scientific journal published by the
Gemological Institute of America. Each
issue is
devoted to
research on diamonds, gemstones...
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Actinolite is an
amphibole silicate mineral with the
chemical formula Ca2(Mg4.5–2.5Fe2+0.5–2.5)Si8O22(OH)2. The name
actinolite is
derived from the Gr****...
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Geological Institute. p. 344. Holmes,
Ralph J.; Crowningshield,
Robert (1983). "
Gemology". In Fyfe,
Keith (ed.). The
Encyclopedia of Mineralogy.
Encyclopedia of...
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MICROSTRUCTURAL STUDY OF
PIETERSITE FROM
NAMIBIA AND CHINA". Gems and
Gemology. 46(n.4): 280–286. doi:10.5741/GEMS.46.4.280. Thomas, A. (2008) Gemstones:...
- "Greenland Ruby Update". Gems &
Gemology. 55 (1). "Mozambique: A Ruby
Discovery for the 21st
Century | Gems &
Gemology". www.gia.edu.
Archived from the...
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Apatite is a
group of
phosphate minerals,
usually hydroxyapatite,
fluorapatite and chlorapatite, with high
concentrations of OH−, F− and Cl− ion, respectively...
