◂ BACK TO GEM ENCYCLOPEDIA
Pearl
Perfect shining spheres. Lustrous baroque forms. Seductive strands, warm to the touch. Pearls are simply and purely organic.
See Gem As
Tools
Research
Vaterite in Freshwater Natural Shell Blister
A baroque-shaped shell blister is examined at the Mumbai laboratory.
Parasite Channels in a Saltwater Natural Pearl
A Y-shaped channel with finer branches indicates parasitic activity in a natural saltwater pearl.
Large Freshwater Cultured Pearls with Atypical Bead Nuclei
GIA’s New York laboratory reports on a submission of two pearl necklaces containing large, intensely colored cultured pearls with unique bead nuclei.
Fancy Black NPD Synthetic Diamond
Gem-Quality Cr-Rich Kyanite from India
India is emerging as a source of gem-quality kyanite.
Indian Ruby Mining
An overview of ruby mining in the southern Indian states of Tamil Nadu and Karnataka.
Tenebrescent Irradiated Scapolite
The effect of irradiation on scapolite with tenebrescence, a color-change phenomenon that occurs after exposure to UV light.
Fine Australian Chrysoprase Rough and Carvings – Tucson 2014
A report on Australian chrysoprase from the 2014 gem shows in Tucson, Arizona.
Stone and Fossil Photography – Tucson 2014
