Excellent specimen with these two minerals from a classic worlwide locality. The white sprays of bultfonteinite are till 5 mm., the beige crystals of Poldervaartite till 5 mm.Showy.
Formula :
Ca2[F/SiO3(OH)] * H2O
System: triclinic Hardness:4½ Rarity:rare
Strunz id:VIII/B.22-40 -
8 : Silicates
Name origin: For the Bultfontein mine, Kimberley, South Africa, where it was first discovered.
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 Specimen weight:316 gr.
 Crystal size:Up to mm. 5
 Overall size: 80mm x 50 mm x 60 mm
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