Topaz

Topaz

Topaz

Topaz

Topaz is named after the island of Topasos in the Red Sea. In ancient times, the name was probably used for the gemstone now known as Peridot.

Data

Formula

Al2 (SiO4) (F, OH) 2
Color Colorless, white, light blue, light green, yellow, yellowish brown or red
Gloss Glass gloss
Hardness 8
Specific weight 3.4 - 3.6
Crystal System Orthomobic or Triklien, this depends on the F:OH ratio
Transparency Clear, Translucent
Location Brazil, Madagascar, Namibia, Nigeria, Zimbabwe

Topaz is found in pegmatites, high temperature quartz veins and also in cavities in granite and rhyolite.

The coloring substances are iron and chrome. Some yellow-brown varieties of certain deposits bleached out in sunlight. Topaz is sensitive to sulfuric acid.

There is an interchangeability with Apatite, Aquamarine, Brazilianite, Chrysoberyl, Citrine, Danburite, Diamond, Edelberyl, Fluorite, Kunzite, Orthoclase, Phenakite, Ruby, Sapphire, Spinel, Tourmaline and Zircon.

If in stock you will find my collection of Raw Gemstones within this group below.

Are you looking for cut Gemstones from the Topaz Group, look at TOPASGROEP

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