Thomsenolite
トムセノライト
1.92 ct
Octagon Cut
9.00 x 6.50 x 4.00 mm
Greenland
max9432

 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