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Ngày 20/09/2018

THE HISTORY OF BIRTHSTONES

The idea of birthstones - a gemstone assigned to each month of the year - is thought to be an ancient one, and scholars trace it back to the Breastplate of ...
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GEMSTONE GLOSSARY (P5)

Precious (gemstone): Traditionally, the four precious gemstones are diamond, ruby, sapphire and emerald. But other gems have also been labelled precious at ...
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CERTIFIED GEMSTONES

In the gemstone trade, many gemstones offered for sale are certified to guarantee their authenticity. As a buyer, it is important to understand the different ...
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GEMSTONE GLOSSARY (P4)

Karat: (as distinguished from Carat) is a measure of the purity of gold. Most gold jewelry is actually made from a gold alloy containing gold and another metal ...
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DIAMOND GIRDLE

The girdle is the thin perimeter of a diamond, dividing the crown above from the pavilion below. When viewing a diamond in its setting or from a profile view, ...
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GEMSTONE GLOSSARY (P3)

Dispersion: The separation of light into the seven spectral colors, causing the "fire" of a gemstone, which is refracted by the internal facets. Diamond has a ...
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BUYING GEMS IN THAILAND

Thailand is well known as one of the most important trading centers in the world for colored gemstones. So it is not surprising that many visitors to Thailand ...
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