-
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...
-
Geological Institute. p. 344. Holmes,
Ralph J.; Crowningshield,
Robert (1983). "
Gemology". In Fyfe,
Keith (ed.). The
Encyclopedia of Mineralogy.
Encyclopedia of...
- Gems &
Gemology is a
quarterly scientific journal published by the
Gemological Institute of America. Each
issue is
devoted to
research on diamonds, gemstones...
-
describe this
unique and
beautiful phenomenon,
which in
gemology is
termed play of color. In
gemology,
opalescence is
applied to the hazy-milky-turbid sheen...
- is
often reflected in the use of
terms such as "Colombian emerald". In
gemology,
color is
divided into
three components: hue, saturation, and tone. Emeralds...
-
Apatite is a
group of
phosphate minerals,
usually hydroxyapatite,
fluorapatite and chlorapatite, with high
concentrations of OH−, F− and Cl− ion, respectively...
-
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****...
