added on 10/23/2024

Ettringite

The rare mineral ettringite (Hydrated Calcium Aluminum Sulfate Hydroxide), closely related to sturmanite, is well-known in specimens from the Wessels locality. It forms as a precipitate from hydrothermal solutions. This is a plate of bright yellow, solid ettringite, crystallized on the surface with the typical nailhead-form crystals.

Locality

South Africa, Northern Cape, Wessels Mine

Species

Ettringite

SizeSmall Cabinet

Comments

Known provenance

Date

Owner

Price

Note

2024/08

Unknown

Not disclosed

—

Unknown

The Arkenstone

Not disclosed

—

2024/08UnknownNot disclosed—

UnknownThe ArkenstoneNot disclosed—

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