A rare blue-green Smithsonite gemstone from Manandriana, Amoron'i Mania, Madagascar.

Smithsonite is a rare zinc carbonate mineral, chemical formula ZnCO₃, named after James Smithson (1765-1829), the British geologist and chemist who first identified the mineral and whose bequest established the Smithsonian Institution.

This fine translucent gem has an appealing icy blue-green colour and very good clarity for the species.

weight:  3.39 carats
shape:   Square emerald cut
dimensions:   7.71 x 7.34 x 5.46 mm
treatment:  None