February 28th - February 28th - 3000 to 5000 B.C.: Ancient...

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February 28 th - 3000 to 5000 B.C.: Ancient Egypt- findings of gemstones as ornaments. - Greek and Roman times: personal adornment, traded and valued as much as today. - Romans wore them as charms, endowed them with magical powers. - Astrology played a role in superstitions surrounding gems- they are linked to the zodiac signs;  i.e. birthstones - These superstitions continue today- crystals were big in the so-called new-age movement - Unfortunately, such superstitions continue which play on people’s gullibility Diamonds - Hardness = 10, brilliant luster - South Africa, Botswana, and Russia are the top three producers (In 2005) - Canada, Russia, and Australia are the only non-African countries in top 15 - The 4 C’s = cut, clarity, color, and carat weight - Carat is 0.2 grams, about 1/5 th  the mass of a paper clip - 2005: ~4500 million carats = 900 metric tons worldwide; total value of $315 billion * About 10% of those are illicit diamonds
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February 28th - February 28th - 3000 to 5000 B.C.: Ancient...

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