{"id":8251,"date":"2026-10-27T05:38:56","date_gmt":"2026-10-27T04:38:56","guid":{"rendered":"https:\/\/www.simattabijoux.com\/?p=8251"},"modified":"2026-10-27T07:29:39","modified_gmt":"2026-10-27T06:29:39","slug":"diamant-synthetique","status":"publish","type":"post","link":"https:\/\/www.simattabijoux.com\/en\/lab-grown-diamond\/","title":{"rendered":"Lab-Grown Diamonds: What They Are, How They Are Made, Certificate and Price"},"content":{"rendered":"
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In short<\/strong> A lab-grown diamond, also called a lab diamond, lab-created diamond or synthetic diamond, is a real diamond<\/strong>: pure carbon, with the same hardness (10 on the Mohs scale), the same sparkle and the same composition as a natural diamond. The only difference is its origin: it is created in a laboratory in a few weeks, under high pressure (HPHT) or by carbon deposition (CVD), instead of forming in the Earth over millions of years. With the naked eye, and even under a loupe, nothing sets them apart; only a properly equipped laboratory can tell the difference. For the same quality, it costs far less than a natural diamond, but it does not resell like an investment.<\/p>\n<\/div>\n

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10<\/p>\n

Hardness (Mohs)<\/p>\n<\/div>\n

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2.42<\/p>\n

Refractive index<\/p>\n<\/div>\n

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D\u2013F<\/p>\n

Our colors<\/p>\n<\/div>\n

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IGI<\/p>\n

or GIA from 0.5 ct<\/p>\n<\/div>\n<\/div>\n

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Lab-grown, lab-created, synthetic diamond: what is it?<\/h2>\n

These expressions all describe the same stone: a diamond created in a laboratory<\/strong>. You will also see “lab diamond” or “man-made diamond”. In France, where we are based, the regulations on the gemstone trade (decree no. 2002-65 of 14 January 2002) require the word “synthetic”<\/strong> to accompany the name of the stone: a jeweler must therefore write “synthetic diamond”, and may add “created in a laboratory”.<\/p>\n

Calling it an “artificial” or “fake” diamond is misleading if it suggests an imitation: a lab-grown diamond is not a fake. It has the composition (crystallized carbon), the crystal structure and the physical and optical properties of a natural diamond. The real imitations are cubic zirconia or glass, which are much softer. Moissanite is a different gemstone, with its own properties: we compare the two in our guide moissanite vs diamond<\/a>.<\/p>\n<\/section>\n

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La Marquisette<\/a> ring: a 1.2-carat oval lab-grown diamond framed by delicate marquise stones.<\/figcaption><\/figure>\n<\/div>\n
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How is a lab-grown diamond made?<\/h2>\n