Falcondoite
3.04 ct
Octagon Cut
17.30 x 6.90 x 2.80
mm y451

Falcondoite

this rare nickel mineral with formula (Ni,Mg)4Si6O15(OH)2 · 6H2O and hardness of 2-3. is here mixed with pecoraite ,anoth nickel silicate with formula Ni3Si2O5(OH)4 and minor nickeline and quartz. Is a brittle material with a nice green color, only suitable for collection.

It comes from Dobsina Teliatcko, Slovakia.