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Black Gemstones
Black Gemstones
Expand your collection with bold black gemstones from JTV. Discover distinctive cuts and hues in our wide selection.
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Gemstone Information
Gemopedia™
Coral has been prized throughout history for its natural beauty. Like pearl, coral is also an biogenic gem consisting of more than 90% calcium carbonate. All coral consists of the remains of skeleton-like support structures that were built by colonies of very small marine animals, known as coral polyps. Proteinaceous coral differs from calcareous coral because it is made up of strong keratin proteins.
