Fall 2009

DIAMONDS
A greenish yellow diamond with glass filling and HPHT treatment.

COLORED STONES AND ORGANIC MATERIALS
Aquamarine with ocean-themed inclusions.
“Smoky” gray beryl.
Chalcedony from Oregon with pyrite and cloud-like green areas.
Demantoid from Ambanja, Madagascar.
Enstatite from Pakistan.
Common opal from Argentina.
Mabe pearls from Vietnam with seashell nuclei.
Characterization of some pearls of the Pinnidae family.
Cat’s-eye phenakite.
Color-change pyrope-spessartine from Kenya.
Preliminary observations on new rubies from Mozambique.
Yogo sapphire update.
Topaz with unstable brown color.
New tourmaline production from Keffi, Nigeria.
“Lilac”-colored Cu-bearing tourmaline from Nigeria.
Triphylite from Brazil.

SYNTHETICS AND SIMULANTS
Colorless synthetic sapphire imitating rough diamond.

MISCELLANEOUS
Update on Myanmar gems.

CONFERENCE REPORTS
3rd European Gemmological Symposium.

ANNOUNCEMENTS
CIBJO resources for retailers.
Gem cutting notes available.

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