Wholesale Lab Diamonds

China supplies about 63% of global lab grown diamonds. Chinese HPHT diamonds account for over 90% of worldwide HPHT production. Better Star is the top Chinese lab diamond manufacturer & supplier with stable quality & good prices. For large carat diamonds, choose IGI or GIA certified stones. Use a 10x loupe to verify the girdle laser code against the certificate.

HPHT & CVD Lab grown diamonds match natural diamonds in all physical, chemical and optical traits. Hardness, heat conductivity and refractive index are exactly the same. HPHT and CVD diamonds with the same 4C specs look almost identical. But manufacturing sets them apart. HPHT diamonds are generally more cost-effective for sizes below 3 carats. For 3 carats and larger, especially high-clarity 10ct and 20ct stones, CVD works better.

Rough lab grown diamond holds plenty of impurities. Uncut and unpolished, it has little transparency and almost no shine — truly a diamond in the rough. Once impurities are removed, precisely faceted and polished, the stone turns clear and brilliantly sparkles.

HPHT rough diamonds often forms cubic or octahedral crystals with sharp edges , frequently with metallic catalyst inclusions and yellow/brown color. CVD rough diamonds generally grows as flat tabular plates, slab-like shape, fewer metal impurities, easier to achieve colorless types.

Loose lab grown diamonds undergo professional cutting and polishing with fixed 4C specifications. They come in diverse shapes, colors and clarities, possessing great transparency and sparkle for immediate jewellery setting.

The quality of rough lab grown diamond has a huge impact on polished loose diamonds. Natural flaws, color tone and crystal shape are fixed within rough stones. Cutting and polishing cannot eliminate inherent defects. Premium rough stone is the foundation of high grade polished diamonds.