Since the 1940s, when the Gemological Institute of America (G.I.A.) introduced the 4C’s (color, clarity, cut and carat) as ...
The intriguing shapes and colors of sea creatures are turning up in gold and silver, diamonds and aquamarines. Ancient ...
Barrington Scott, who learned to swim after enlisting in the Marines, completed dives on every continent in just 19 days.
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