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Explains how different environments affect different gemstones. Gemstones included in the book are agate, amber, amethyst, diamond, emerald, jasper, lapis lazuli, opal, ruby and sapphire.
Explains how different environments affect different gemstones. Gemstones included in the book are agate, amber, amethyst, diamond, emerald, jasper, lapis lazuli, opal, ruby and sapphire.