Thaumasite (rough and cut set) - image 1

Thaumasite (rough and cut set)

0.7 x 0.4 x 0.4 cm (Specimen); 1.11 carats; 9.67 mm x 5.08 mm (Gem) - Thaumasite is an uncommon mineral with an unusual chemistry as it has a composition of carbonate, sulphate and hexahydroxysilicate anions. The best and possibly ONLY gem material is from South Africa. These pieces are the finest known examples of Thaumasite extant, but crystals are rarely over 2 cm, and gems are few and far between. The crystal in this set is a well-formed, gemmy, terminated, hexagonal prism with a classic soft yellow hue. The stone is actually a bit larger than the crystal and has a beautiful "Cut Corner Rectangle" cut with only very very slight inclusions, and is nearly colorless. When one is collecting rare gems, Thaumasite is a must have, and this set would make a great addition to any collection, especially because the stone is over 1 carat in weight.

Unknown Owner

Product details

Species

Thaumasite

SizeThumbnail

Dimensions0.7 x 0.4 x 0.4 cm

Locality

South Africa, Northern Cape, N'Chwaning Mines

Added on10/23/2024

Comments

Known provenance

2024/08