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Esimerkit

• Gem-quality olivine is known as peridot, which has a subtle green light all its own.
• Although there are dozens of different types of gems, among the best known and most important are [...]. (Common gem materials not addressed in this article include amber, amethyst, chalcedony, garnet, lazurite, malachite, opals, peridot, rhodonite, spinel, tourmaline, turquoise and zircon.)