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Emerald and Beryl
Emerald and Beryl in Ancient India
Plinys Natural History
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albite alkali American Mineralogist apatite aquamarine aquamarine crystals bertrandite beryl crystals beryl is found beryl occurs beryl-bearing beryllium biotite blue beryl blueish Brazil Bulletin c-axis cabochon carats cassiterite cavities Chapter in U.S. Chivor chrysoberyl Colombia color colorless columbite common beryl containing County crystals occur cut gems described diameter diamond district emerald crystals emerald deposits emerald mines engraved erald faceted feldspar fluorite gem beryl gemstones gneiss golden beryl granitic granitic pegmatites greenish Habachtal hexagonal inclusions India jewels Kunz Lapidary lepidolite locality London Madagascar matite mica Mineralogie minerals morganite Mountains muscovite Museum Muzo noted numerous order prism pale blue pale green pegmatite pegmatite bodies phenakite pink precious stones prismatic prisms produced quarry quartz range rarely refractive region reported River rocks schists Smaragd South species specimens spodumene tons topaz tourmaline transparent U.S. Geol veins vugs yellow yellowish zones