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What are Certified Diamonds?

Certified diamonds are diamonds that have been graded by a gem laboratory based on their "4 C" attributes of Cut, Color, Clarity and Carat Weight. When shopping for a diamond, it is highly recommended to purchase a certified diamond to ensure the quality of the stone.

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Marquiselaboratory issues the Diamond Dossier for loose, natural diamonds between 0.15 and 1.99 carats, in the D-to-Z color range. The Diamond Dossier is not issued for synthetics, simulants, mounted diamonds, diamonds that have undergone unstable treatments such as fracture filling or coating, or those that have been HPHT processed. Any evidence of other treatment is disclosed in the report.
includes an assessment of the 4Cs – Color, Clarity, Cut and Carat Weight – plus a microscopic laser inscription of the report number for easy identification in a smaller format.
Diamond Sealing Service seals an unmounted diamond and its key grading details in secure, tamper-resistant packaging. This service is available for colored or D-to-Z diamonds and is accompanied by a report service.

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