Kilchoanite
Birkhin gabbro massif, Narin-Kunta, Irkutsk Oblast, Russia
Very rich specimen of coarse-granular rock, composed by almost pure colourless transparent Kilchoanite with minor inclusions of greenish Clinozoisite and reddish brown Vesuvianite crystals. The rock is slightly altered along fissures by white microcrystalline masses of secondary Ca-hydrosilicates - Plombierite, Riversideite, Tobermorite etc. ...
© Pavel M. Kartashov collection & photo