Specimen with Ettringite crystals up to 1,0 cm tall on contrasting matrix. They are a translucent bright lemon yellow colour. A nice specimen from the famous South African locality.
Ca6Al2[(OH)1/(SO4)3] * 26 H2O
System: hexagonal Hardness:2-2½ Rarity:not common
Strunz id:VI/D.13-10 -
SULFATES, CHROMATES, MOLYBDATES and TUNGSTATES
Name origin: After the type locality at Ettringen, Rhineland-Palatinate, Germany.
Specimen weight:74 gr.
Crystal size:Up to 1,0 cm tall
Overall size: 52mm x 38 mm x 30 mm