Sturmanite, Ettringite, Charlesite - image 1

Sturmanite, Ettringite, Charlesite

Unknown Owner
Help improve this recordNo owner is registered for this specimen yet. If it's yours or you know more about it, you can add the owner, provenance, publications and other details.
Sign in to contribute
A SUPERB, LARGE and glassy yellow-brown crystal that exhibits all three members of the solid solution series of sturmanite, ettringite and charlesite from the famous Nchwaning II Mine. This undamaged crystal has sturmanite and charlesite on the outside and ettringite on the inside of the crystal. It has a few stepped growth elements on the edges that show one internal member of the series, charlesite, under the sturmanite coating (those spots are not damage). The backlit photo highlights the translucency and yellow-cored interior composed of the lemon-yellow ettringite. 5.4 x 2.4 x 1.7 cm

Product details

SpeciesEttringite, Sturmanite
SizeSmall Cabinet
Dimensions5.4 x 2.4 x 1.7 cm
Added on10/23/2024
LocalitySouth Africa, Northern Cape, N'Chwaning II Mine

Known provenance

DateCollectorAcquisition price
08/2024Unknown OwnerNot disclosed
—The ArkenstoneNot disclosed

Learn more

Ettringite
Mineral guide
Learn about Ettringite
lemon-yellow hexagonal prisms; a fragile hydrated sulfate with notable localities like Kalahari and Eifel, Crestmore, prized by collectors.
Ettringite
Regional guide
Ettringite from N'Chwaning II Mine, South Africa
from N'Chwaning II, South Africa: lemon-to-sulfur yellow, glassy hexagonal prisms with inner glow; valued for color, form, and provenance.