Calcite, Ettringite

TwoPie's Collection

Calcite, Ettringite
Calcite, Ettringite
Calcite, Ettringite
Calcite, Ettringite
Calcite, Ettringite
Calcite, Ettringite

Minerals

Calcite,Ettringite

Locality

N'Chwaning II Mine- N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa

Other Names

方解石, 钙铝矾

Detail

Size:4.6×5.4×4.4 cm
Weight:114.9 g
Number:NCHW-024 (7FF8-2025PWTH)

Description

Small stubby opaque white prismatic hexagonal crystals and some opaque to edge transparent crystals of ettringite on a large crystals of calcite. The ettringite is opaque with some exceptions being edge transparent and slightly yellowed with a vitreous lustre. There is an attached fragment of lamellar hausmannite on andradite on country rock ironstone. The large calcite to 4.6cm x 3.6cm wide is a hex with a modified trigonal termination that is covered by ettringite.