Articles
Diamond education, buying guides and jewelry care from our gemologists.
Certification & Grading
Every OENLI diamond over 0.25ct ships with an independent IGI (International Gemological Institute) or GIA (Gemological Institute of America...
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Lab-Grown vs. Mined
To the naked eye — and to the loupe — there is no visible difference. Both are 100% carbon with a hardness of 10 on the Mohs scale. The choi...
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What Is a Lab-Grown Diamond?
A lab-grown diamond is a real diamond — same carbon crystal structure, same optical, thermal and chemical properties as a mined diamond — cr...
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