Description
Sorensenite 0.92 ct. 8 Sided Cup super rare 6.80 x 6.40 x 4.00 mm Greenland y99777 world clas
this is large for the rare Stone
Sorensenite
Sørensenite is a very rare sodium tin beryllium silicate with formula Na4SnBe2Si6O18•2(H2O) and hardness of 5.5.
It occur as thin elongated small prismatic crystals and is found only in the llimaussaq complex, Greenland.
It shows a weak reaction at uv light ,either in long at whort wave; here is at short wave.The blackish inclusions are aegirine.