MINERAL GEM WORLD

TOPAZ ROUGH

This is a natural untreated rough from Torrington in nsw Australia.

Clean stones with a tinge of yellow.

Weight 11.40 cts app

Size 15 x 13 x 10 mm app

Torrington is a small town in the New England district of NSW. This area produces a wide variety of gemstones and minerals. Creeks between Emmaville and Torrington produce Topaz, Quartz, varieties and even the accessional alluvial Diamond or sapphire generally the area north of the Severn River is noted for its Topaz. Topaz can be pale amber to clear prismatic crystals with a perfect basal cleavage on 001. Common natural colours in Australia are clear, pale honey yellow, pale blue. The Topaz Crystal system is Orthorhombic and topaz has a hardness rating of 8 on the Mohs Scale.

Topaz is a hydrous silicate of Aluminium and Fluorine, it often occurs in acid igneous rocks, such as granite, where crystals may occur in

Pegmatite’s  

.Topaz is often associated with fluorite, and beryl.