Friday, October 3rd, 2008
Name:
The name derives from the French word ‘Citron’ meaning lemon.
Description:
Citrine is a golden yellow stone obtaining its colour from the presence of iron. Most Citrine is pale yellow and some after heat-treatment become deeper in colour.
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Friday, October 3rd, 2008
Name:
The name amethyst derives from the Greek word “Amethystos”, which is basically translated as ‘not drunken’
Description:
Amethyst comes in a broad range of shades ranging from pale lilac to deep purple.
Gemmological Characteristics:
Amethyst is found in alluvial deposits. Its hardness in the Rohm scale is 7 and its crystal structure is trigonal, with a composition of silicon dioxide and vitreous lustre.
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Friday, October 3rd, 2008
Name:
The Greek name for amber was ηλεκτρον (Electron) and was connected to the Sun God, one of whose titles was Elector or the Awakener. The modern term electron was coined in 1891 by the Irish physicist George Stoney, using the Greek word for amber (and which was then translated as electrum) because of its electrostatic properties and whilst analyzing elementary charge for the first time.
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Monday, September 29th, 2008
What are Gemstones?
Gemstones are generally minerals that have been formed over thousands or millions of years. Gemstones may be formed from pure mineral (diamond is essentially pure carbon), a simple chemical compound (quartz is silicon dioxide), or a more complex mixture of various compounds and elements (the garnet family includes a highly variable mix of iron, magnesium, aluminium and calcium silicates). The great majority of familiar gem materials are oxides or silicates (i.e they contain oxygen and perhaps silicon) and formed as crystals during the cooling of the earth’s crust over past millennia.
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