Thomsenolite
トムセノライト
3.39 ct
Octagon Cut
11.20 x 7.50 x 4.60 mm
Greenland
max9444

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