Imitation Rainbow Moonstone Assemblage
Examination of an imitation rainbow moonstone assemblage containing plastic-coated gypsum.
Composite Amber with an Unusual Structure
This 9.12 gram amber composite featured a combination of natural and imitation amber, accompanied by natural and artificial insect inclusions.
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.
Dyed Green Beryl
A step-cut beryl is dyed to simulate emerald.
Imitation Rubellite Boulders
Specimens presented as rubellite tourmaline rough are found to be resin imitations with lead inserts.
Color-Change Glass as a Zultanite Imitation
Two samples, presented as Zultanite, are revealed to be color-change glass.
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.
Dyed Marble as a Purple Sugilite Imitation
Investigation of a purple bangle identified it as a dyed marble imitation of sugilite.
Dyed Bone as a Red Coral Imitation
A specimen presenting as red coral is revealed to be dyed bone.