Research Article Search Results
Play-of-Color on a Pen Pearl
Calcitic crystals on the surface of a pen pearl display a play-of-color phenomenon under fiber-optic illumination.
Color-Treated Purple Diamond Rough with Interesting Growth Pattern
Patterns observed in a color-treated purple diamond reveal details about its growth history.
Animal Motifs with Purpose
Jewelry designer Samira Mazloom draws awareness to endangered species with her unique “Fading Footprints” collection.
“Spiderweb” Structure on a Pearl’s Base
Examination of a natural pearl reveals a cavity formation with thread-like filaments.
Hardstones in Fine Jewelry
Eleux Jewelry offers unique pieces pairing hardstones such as agate and turquoise with diamonds and other precious gems.
Interpenetrant Twins in Natural Diamond
A vivid orangy yellow rough diamond displaying penetration twinning is examined in the Carlsbad laboratory.
Ninth Annual Gianmaria Buccellati Foundation Award Winner
A graduate of GIA’s Jewelry Design program in Carlsbad, California, is the recipient of the 2025 Gianmaria Buccellati Foundation Award.
Euhedral Aquamarine Crystals in Quartz
Microscopic examination of quartz reveals well-formed blue hexagonal prismatic crystals exhibiting moderate pleochroism.
Emerald with Abundant Magnetite Inclusions
An unusually high abundance of magnetite in four distinctive crystal habits is observed in a Zambian emerald.
Cinnabar in Quartz
Striking red cinnabar inclusions are observed in a quartz specimen from China.
New Chrysoprase Production from Western Australia
GIA’s Bangkok laboratory reports on a study of rough and cut chrysoprase from a newly discovered deposit in Western Australia.
A Fashioned Dyed Shell Imitation Pearl
An imitation is identified in a parcel of non-nacreous pearls submitted to the Mumbai laboratory.
