Is there a more potent way to telegraph luxury than pure gold? A new exhibition in Paris, titled “Golden Thread,” shows how ...

Gemstones are valued based on the Four Cs - color, clarity, cut, and carat. Precious stones include diamonds, sapphires, rubies, and emeralds. Semi-precious stones are evaluated on their rarity and ...

Since the “Saharan Gold Rush” in the 1990s, one researcher has been fighting for the North African country’s contributions to ...