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Weight: 7.33 ct
Size: 17.2 x 8.7 x 6.5 mm
Thin needles of blue amphibole riebeckite in quartz. High concentration of inclusions in this sample causes blue color of the stone in general.
Reportedly, also rare blue tourmaline olenite have been identified together with riebeckite in this kind of material.
Crystals of quartz with these bluish fluffy amphiboles inside are commonly sold under commercial name “blue tara quartz”.
Best sample of all for this type of material!
Cut: rectangular cushion cut, faceted, checkerboard crown
Origin: Minas Gerais, Brazil