UssingiteIs a Aluminum Sodium Silicate with formula Na2AlSi3O8(OH). Hardness is 6.5- It is found in Ilimaussaq, Tasseq, Greenland. Is not very popular and although is quite hard, remain a stone for collector. Is translucent with a pale pink-lavander color similar to a chalcedony or a rose quartz. Size: 12.8x12.7x7 mm. Weight: 6.96 ct. CODE#1957