11, 2012 — just one day before the awards ceremony that year Richard Corkery/NY Daily News via Getty The world lost the voice of a generation when Whitney Houston died on Feb. 11, 2012.

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Before Kevin Costner, there was David Roberts. The former police officer, who went on to become Whitney Houston’s bodyguard, has written a memoir, "Protecting Whitney." It details how Welsh-born ...

GIA美国宝石研究院成立于 1931 年，是全球权威的钻石、彩色宝石和珍珠研究机构。 GIA 是一个非营利的公益性机构，是宝石与珠宝知识、标准和教育的主要来源。 欢迎关注 GIA。 全球各地的学生来到 GIA 寻求知识、学习技能、获取证书，以求建立成功的宝石和珠宝 ...

Diamonds and other gemstones are weighed in metric carats: one carat is equal to 0.2 grams, about the same weight as a paperclip. (Don’t confuse carat with karat, as in “18K gold,” which refers to ...