Thomsenolite
トムセノライト
3.01 ct
Cushion Cut
9.40 x 8.10 x 5.10 mm
Greenland
max9431

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