Thomsenolite
トムセノライト
3.23 ct
Octagon Cut
9.30 x 9.20 x 2.80 mm
Greenland
max9443

Thomsenolite uncommon mineral with formula of NaCaAlF6•(H2O) and hardness of 3.5.

It comes from Ivigtut Mine, Ivittuut town (formerly Ivigtût), Arsuk Fjord, Sermersooq, Greenland