Emerald is a variety of the mineral beryl, with the chemical formula Be₃Al₂(SiO₃)₆. The chemical composition clearly shows the presence of Beryllium (Be) metal. The green color of emerald comes from trace amounts of chromium or vanadium within the crystal lattice.
Which one of the following gemstones contains beryllium metal?
Asked in UPSC CAPF 2018 · Topic: Metals, Minerals, Ores: Properties, Uses (Important ores of common metals (e.g., iron, aluminum, copper, zinc, lead, mercury) and their chemical formulae)
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