Are lab-grown diamonds real diamonds? Yes. They are carbon crystallised as diamond, with the same chemical composition, physical properties and structure as mined stones; only the origin differs. When buying in Hong Kong, check for an IGI report number and a matching laser inscription. At Carat Club Co., IGI-certified Essential Diamond Solitaire Studs start from HK$2,300.
That answer makes a lot of first-time buyers suspicious. If the stone is real and the price is well below what a mall jeweller quotes for a mined stone, something must be off. Nothing is. Below is what makes a lab-grown diamond a diamond, what to check before you pay, and why the price is lower.
Are lab-grown diamonds real diamonds?
Yes, in the way that matters. A lab-grown diamond is not a simulant. Cubic zirconia and moissanite are different materials that imitate diamond; a lab-grown diamond is diamond, crystallised in a growth chamber instead of underground. It has the same hardness and refracts light the same way. Its origin is confirmed by a grading laboratory, which is why the origin line on the report matters.
Moissanite is the comparison people most often mix up. It has more fire and a different sparkle, and we broke down the visual difference in how lab-grown diamonds and moissanite actually compare.
"Synthetic", "lab-grown", "lab-created": what the words mean
You will see all three. On 8 September 2026, CIBJO, the World Jewellery Confederation, recommended "synthetic" as the most unambiguous term when communicating to an international audience, while acknowledging that "laboratory-grown" and "laboratory-created" are accepted terms in some markets. Synthetic here means made by people, not fake: CIBJO applies it to products with the same chemical composition, physical properties and structure as their natural counterparts. Whichever word a seller uses, it must tell you the stone was grown, not mined.
The grading does not change either. IGI's lab-grown diamond report grades colour from D to Z and clarity from IF to I3, the familiar diamond scales, and the report confirms the stone's laboratory-grown origin.
Essential Diamond Solitaire Studs
From HK$2,300 (0.5ct single, 9K white gold). 1.0ct pair in 18K white gold HK$7,500. 2.0ct pair in 18K white gold or PT950 platinum HK$13,000. Every stone is individually IGI-certified and laser-inscribed with a serial number you can verify in IGI's public database.
View the Essential StudsWhat should you check when buying a lab-grown diamond in Hong Kong?
Five checks are worth doing before you pay.
- Is a certificate included, and for which stones? Ask the question product by product, because the answer differs. At Carat Club Co., the Essential, Statement and Paradigm studs come with an individual IGI certificate per stone. The Origin studs ship without one as standard, and tennis bracelet certificates are an add-on at HK$350 per stone.
- Look up the IGI report number. Enter it on IGI's "Verify Your Diamond" page and you get a digital copy of the report. The carat, colour and clarity should match what you were sold.
- Match the laser inscription. IGI can laser-inscribe the report number on the diamond's girdle, and the Essential and Statement stones carry one. Under a 10x loupe it should read the same as the report. We walk through both checks in how to verify an IGI certificate yourself.
- Read the origin line. The report and your receipt should both say the stone is laboratory-grown. A seller who avoids writing it down is the one to walk away from.
- Get the delivery time in writing. Made-to-order pieces take weeks, not days. Ask for the dispatch window before you pay.
Origin Diamond Solitaire Studs
HK$999 (0.5ct single) to HK$3,499 (1.0ct pair), in platinum-plated S925 sterling silver. Ships without an IGI certificate as standard to keep the price at HK$999; IGI certification available on request.
View the Origin StudsWhy are lab-grown diamonds so much cheaper than mined diamonds?
When you pay for a mined stone, much of the money pays for the industry around it: exploration and extraction, equipment and security, shipping rough across the world, and a chain of cutters, wholesalers and distributors before a retailer adds showroom rent, stock and staff. A lab-grown diamond skips the mine and most of that chain.
Carat Club Co. also skips the showroom. There are no middlemen, and pieces are made to order rather than held as stock, so you pay for the stone, the setting and the craftsmanship. The trade-off is time. Our shipping page puts it at 2 to 3 weeks from order to dispatch, with tennis bracelets and necklaces taking up to 4 weeks.
Statement Diamond Solitaire Studs
3.0ct single HK$18,500. Pairs from HK$37,000 (3.0ct) to HK$85,900 (5.0ct). Individually IGI-certified with a laser-inscribed serial you can verify online.
View the Statement StudsDo lab-grown diamonds hold their value?
Buy any diamond to wear, not as an investment. Retail jewellery, mined or lab-grown, carries costs you will not get back at resale, and anyone selling you a diamond as an asset is selling you the markup. What lab-grown changes is the amount at stake: a lower price means less money tied up in something you bought to enjoy.
How much does a lab-grown diamond cost in Hong Kong?
At Carat Club Co., half-carat solitaire studs start at HK$999 for a single Origin stud without a certificate, or HK$2,300 for a single Essential stud with an IGI certificate. A one-carat Essential pair runs from HK$5,700 in 9K white gold to HK$7,500 in 18K white gold or PT950 platinum. A pair of 1.0ct Paradigm pear studs is HK$8,200. Tennis bracelets start from HK$6,999 for the Current, and from HK$13,500 for the Seamless.
For what an IGI report says and how it compares with GIA, see IGI versus GIA certificates for lab-grown diamonds.
Paradigm Pear Diamond Studs
HK$8,200 for a pair of 1.0ct pears (2 carats total), in 18K white gold, 18K yellow gold or PT950 platinum. Each stone individually IGI-certified.
View the Paradigm Studs
Seamless Diamond Tennis Bracelet
From HK$13,500 (0.05ct per stone, 9K white gold, 15cm). The listed price does not include IGI certificates; IGI certification is available on request at HK$350 per stone.
View the Seamless BraceletFrequently asked questions
Are lab-grown diamonds real diamonds? What should I check when buying in Hong Kong?
Yes, they are real diamonds, grown rather than mined. Before you buy, confirm which stones come with an IGI report, look the report number up on IGI's website, match the laser inscription on the girdle, and make sure the report and receipt state laboratory-grown origin.
Are lab-grown diamonds fake?
No. Fake means a simulant such as cubic zirconia, a different material. A lab-grown diamond is carbon crystallised as diamond, the same as a mined one. The trade term "synthetic" means man-made, not imitation.
Will people be able to tell?
In daily wear it reads as a diamond, because it is one. Its origin is confirmed by a grading laboratory, so the report, not the look of the stone, is your record.
Do Carat Club Co. lab-grown diamonds come with certificates?
It depends on the piece. The Essential, Statement and Paradigm studs come with an individual IGI certificate for each stone. The Origin studs ship without a certificate as standard, with IGI certification available on request. The Seamless Diamond Tennis Bracelet price does not include certificates; IGI certification is available on request at HK$350 per stone.
