It spent $20.2 billion on diamonds in 2019 or 19.2% of the global market share. About 46% of rough diamonds are for industrial purposes, while 19% are used as gem-quality polished mineral stones.

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Here's where to buy the best affordable jewelry. Our style editors tested top brands to see which are tarnish-proof, hypoallergenic, and high quality.

For rough diamond characterization, you can submit to GIA laboratory locations in Antwerp, Johannesburg, Botswana, Mumbai, Surat, New York and Japan. You may submit the polished diamond for the ...