This is a parallel-growth cluster of bladed, glassy and gemmy, orangey crystals of Volkovskite.
Formula : KCa4[Cl/(B(OH)3)2/(B5O_8_(OH))4] * 4 H2O
System: triclinic Hardness:2½ Rarity:very rare
Strunz id:V/K.5-10 -
NITRATES, CARBONATES and BORATES
Name origin: Named in honor of A.I. Volkovskaya (А.И. Волковской), Russian petrographer who first found the mineral in water insoluble residues from drill cores.
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Specimen weight:10 gr.
Crystal size:3,5 cm tall
Overall size: 14mm x 9 mm x 35 mm

Owner : Minservice (Sondrio - Italy) Minservice Galleries Main 
This specimen will be shipped by: Minservice
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