Colorful Chatoyant Glass
A devitrified glass reminiscent of Victoria Stone is seen during the Tucson gem shows.
Dyed Yellow Beaded Freshwater Cultured Pearls Imitating South Sea Cultured Pearls
A yellow cultured pearl necklace is compared to the work of a producer specializing in freshwater pearls of all colors.
Color-Change Glass as a Zultanite Imitation
Two samples, presented as Zultanite, are revealed to be color-change glass.
Imitation Rubellite Boulders
Specimens presented as rubellite tourmaline rough are found to be resin imitations with lead inserts.
Golden Coral Imitated by Plastic
A bracelet created to simulate the properties of golden coral is proven to be a plastic imitation.
Serpentine Cabochon with Unusual Olive Green Color
A green cabochon from China resembling jadeite is found to be antigorite, a member of the serpentine group.
Coated Rock Crystal Imitation of Ruby
A coated rough rock crystal resembles a purplish red ruby.
Color-Change Synthetic Cubic Zirconia as Peridot Imitation
A greenish yellow material set in a ring as a peridot imitation is identified as synthetic cubic zirconia.
Moldavites: Natural Or Fake?
A gemological investigation into natural moldavite and its more recent imitations.
Dyed Green Marble Imitating Jadeite
What appeared to be high-quality jadeite was actually dyed green marble with calcite as the main mineral.