An extremely rare member of taaffeite family-a rare gemstone double refraction in other stones were discovered in 1967 in the Musgrave in South Australia. Musgravite (the latest gemstone in this list) is the silicate mineral containing the main ingredient is beryllium (Be), magnesium (Mg) and aluminum (Al). Two Musgravite many are first found in Sri Lanka in 1993, from 2005 to the present, the landmarks are reported to have found Musgravite including Greenland, Madagascar, Antarctica, Sri Lanka and Tanzania. The stone Musgravite the largest known currently owned by Mulitcolor.com and weighs 5.74 carat.
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