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Starburst Stone is a colorful new devitrified glass.
Colorful Chatoyant Glass

A devitrified glass reminiscent of Victoria Stone is seen during the Tucson gem shows.

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Uneven color and blemishes on low-quality cultured pearl necklace.
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.

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Glass imitations of Zultanite.
Color-Change Glass as a Zultanite Imitation

Two samples, presented as Zultanite, are revealed to be color-change glass.

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Sections of imitation boulder.
Imitation Rubellite Boulders

Specimens presented as rubellite tourmaline rough are found to be resin imitations with lead inserts.

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Comparison of golden coral and plastic beads
Golden Coral Imitated by Plastic

A bracelet created to simulate the properties of golden coral is proven to be a plastic imitation.

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Olive-green serpentine cabochon.
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.

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Rock crystal coated with brown skin.
Coated Rock Crystal Imitation of Ruby

A coated rough rock crystal resembles a purplish red ruby.

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Synthetic cubic zirconia imitation of peridot.
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.

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Silver brooch with glass
Moldavites: Natural Or Fake?

A gemological investigation into natural moldavite and its more recent imitations.

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Dyed green marble imitating jadeite
Dyed Green Marble Imitating Jadeite

What appeared to be high-quality jadeite was actually dyed green marble with calcite as the main mineral.

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