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A laboratory-grown diamond is pure crystallised carbon, grown in a laboratory from a small diamond seed. It has the same chemical, physical and optical properties as a diamond formed in the earth: the same hardness, the same sparkle and the same grading by cut, colour, clarity and carat. Only its origin is different, and Indian rules (IS 19469:2025) require it to be sold as a "laboratory-grown diamond", which is how every Luminique stone is described.

No. American diamond (AD) is cubic zirconia, a different, softer material that only imitates a diamond and scratches and clouds over time. A laboratory-grown diamond is carbon, scores 10 on the Mohs hardness scale and is graded and certified like any diamond. Moissanite and zircon are also different materials, not diamonds.

Yes. A standard thermal or conductivity diamond tester reads a laboratory-grown diamond as diamond, because it is diamond. Only advanced laboratory equipment can tell a laboratory-grown diamond from an earth-formed one, which is why the certificate matters.

Yes, at Luminique. Our lifetime buyback pays 85% of the current market value of the laboratory-grown diamonds and 100% of the current market value of the gold. Lifetime exchange credits 100% of both towards a new piece. Current market value is Luminique's selling price on the day you come to us. Full terms and a worked example are on our Lifetime Exchange and Buyback page.

Prices depend on gold weight at the day's gold rate, the total diamond weight and the making. In 9KT gold, Luminique rings start from about ₹15,000 and most are under ₹1 lakh; earrings and pendants start from about ₹22,000 to ₹25,000; bracelets and necklaces carry more stones and gold and are priced higher. Every option is priced openly on the product page.

Buy a laboratory-grown diamond to wear, not as an investment. Diamond prices can change, and our buyback and exchange use the current market value on the day, not the price you paid. The gold in your piece keeps its full value at the day's gold rate under our policy.

Yes. Since July 2025, 9KT gold (37.5% pure gold) must carry a BIS hallmark with a 6-digit HUID, like 14KT and 18KT. Gold in any Luminique piece, including 9KT, is valued at 100% of the current market value under our lifetime exchange and buyback.

IGI (International Gemological Institute) and SGL are independent laboratories that grade the diamond and record its carat, colour, clarity and cut. Every certified Luminique stone comes with a report number. Enter that number on the lab's website (igi.org for IGI, sgl-labs.com for SGL) to see the full report.

You can return any item within 7 days of delivery, no questions asked, if it is unworn with its security tag, invoice and certificate. Custom-made or engraved pieces cannot be returned. Refunds go to your original payment method within 7 to 10 working days after quality check.

Check four things before you buy from anyone: an IGI or SGL certificate you can verify online, BIS hallmarked gold with HUID, buyback and exchange terms written down with percentages, and a clear return window. Luminique shows all four on every product and policy page.