About 明升体育app_明升体育-官网

A Tradition Of Science and Education

Established in 1931, 明升体育app_明升体育-官网 is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, 明升体育app_明升体育-官网 is the leading source of knowledge, standards, and education in gems and jewelry.

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EDUCATE

Students around the globe turn to 明升体育app_明升体育-官网 for the knowledge, skills, and credentials that launch successful gem and jewelry careers.

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RESEARCH

The world leader in gemological research, 明升体育app_明升体育-官网’s breakthrough discoveries deepen our understanding of gemstones and the world.

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PROTECT

Through research, education, and unbiased gem grading and analysis, 明升体育app_明升体育-官网 strives to protect the gem and jewelry buying public by setting global quality standards.

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CREATOR OF THE 4Cs

In the 1940s, 明升体育app_明升体育-官网 established the “4Cs” and the International Diamond Grading System? – to this day, the worldwide standard for evaluating diamond quality.

Cut

diamond cut

The sparkle and brilliance of a diamond depends more on its cut than anything else.

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Clarity

diamond clarity

The absence of inclusions and blemishes makes a diamond rare and affects value.

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COLOR

diamond color

Diamonds in the D-to-Z color range are valued by how closely they approach colorlessness – the less color, the higher their value.

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CARAT WEIGHT

diamond carat weight

Diamonds and gemstones are weighed in metric carats: one carat is equal to 0.2 grams, about the weight of a paperclip.

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