Posts Tagged ‘ alumina ’

Topaz

September 16, 2009

By precious stones

The name topaz is derived from the Greek topazos, which is the name of a small island situated in the Gulf of Arabia, from whence the Romans obtained a mineral which they called topazos and topazion, which mineral to-day is termed chrysolite. The mineral topaz is found in Cornwall and in the British Isles...
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Tags: alumina, aluminium, blue, chrysolite, cleavage, cobalt, diamond, fluoride, green, grey, mineral, nitrate, powder, quartz, silicium, spinel, topaz, topaz dust, topazion, topazos, white
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