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Kunzite pendant with diamonds.

Tsavorite necklace with diamonds.

Tanzanite and diamonds drop earrings.

Assorted Morganite rings with diamonds.

What A Gem

Tiffany & Co's vice president offers tips on investing in jewels
Apr 20, 2018 5:50 AM

Diamonds may be a girl's best friend but for girls who want to invest, gems may be their best bet yet. After all, "Charles Tiffany (who founded Tiffany & Co in 1837) was not only known as king of diamonds, he was also known as the king of coloured gemstones," says Tiffany & Co's chief

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