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Introduction to Gems
Supply and Marketing Information
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agate Amazonite amethyst appear aquamarine banded beads BERYL Brazil brilliant brills brown brownish Burma buyer cabochon gems cabochon grade cabochons calcite California cameos carats carver carvings catseye Ceylon chalcedony chatoyant chrysoberyl citrine clean ct collectors colorless coral corundum cost cracks cultured pearls cut gems cutters dark green diameter diamond drilled emerald facet grade faceted gems fair FELDSPAR finest flawless flaws GARNET gems cut gemstones grad greenish hues Idar-Oberstein inclusions India jadeite jewelry lapidary light Madagascar massive material medium dark Mexico mineral moonstones nephrite nodules opal orange ornamental oval cabs pale green pearls pieces pink polish rare Rhodonite rock crystal rough ruby rutile sapphire sections seldom shape shell slabbed soft sold sometimes specimens star step cuts stones surface synthetic thick tigereye tourmaline translucent transparent tumbled gems tumbling grade uniform usually variety various williamsite yellow yellow-green