Lab Grown Diamond Guide Hong Kong | Roselle Jewelry
Lab-Grown Diamond Guide for Hong Kong Buyers
Lab-grown diamonds are real diamonds produced in a controlled laboratory environment. They have the crystal structure and core optical and physical properties of diamond. They are not cubic zirconia, moissanite or Roselle's Rz® simulated diamond.
Roselle Jewelry helps Hong Kong customers compare loose lab-grown diamonds, engagement-ring settings and finished jewellery online or at our Causeway Bay and Tsim Sha Tsui stores. Availability, grading reports and specifications vary by item, so confirm the individual stone rather than relying on universal claims.
Browse lab-grown diamonds · Visit our Hong Kong stores · Request a comparison or appointment
What should you compare?
1. The individual grading report
Check the report number, laboratory, measurements, carat weight, colour, clarity, cut information, fluorescence and any disclosed growth or post-growth treatment. Roselle may offer stones with reports from laboratories such as IGI or GIA where stated on the individual listing. A report is not implied when it is not shown.
2. Cut and proportions
Carat weight describes weight, not visible size. Compare measurements, table, depth, symmetry and polish together. For round brilliant diamonds, cut quality strongly affects brightness; for fancy shapes, outline, bow-tie visibility and visual balance also matter.
3. Colour and clarity in person
Two diamonds with the same headline grades can look different. Review video or imagery when available and ask to compare shortlisted stones under consistent lighting. Consider whether inclusions are visible without magnification and whether the colour suits the chosen metal.
4. Growth method and treatment disclosure
CVD and HPHT are established laboratory-growth methods. Either can produce jewellery-quality diamonds. Type classification and post-growth treatment vary; do not assume every lab-grown diamond is Type IIa or untreated. Use the individual report and seller disclosure.
5. Total ring specification
For an engagement ring, compare the centre stone, side stones, metal, setting style, ring size, production time, after-sales service and whether the displayed price includes the centre diamond. A setting-only product should be clearly separated from the loose diamond.
Lab-grown, mined and simulated stones
| Stone | What it is | How to verify |
|---|---|---|
| Lab-grown diamond | Diamond grown using a laboratory process | Individual report and inscription where supplied |
| Mined diamond | Diamond formed naturally and recovered through mining | Individual report and seller disclosure |
| Moissanite / cubic zirconia / Rz® | Diamond simulants made from different materials | Product description and testing; they must not be represented as diamond |
Price and resale expectations
There is no permanent percentage by which a lab-grown diamond will cost less than a comparable mined diamond. Prices change with supply, demand and specifications. Compare current like-for-like stones and choose for appearance, budget and intended use rather than assuming future resale value.
How Roselle Jewelry can help
- Shortlist loose diamonds by shape, carat, colour, clarity, cut information and budget.
- Explain which grading information is available for each stone.
- Pair a loose diamond with a compatible engagement-ring setting.
- Arrange an in-store comparison when the requested items are available.
- Discuss custom ring design, ring sizing, production timing and after-sales questions.
Frequently asked questions
Are lab-grown diamonds real diamonds?
Yes. They are diamonds created by a laboratory growth process. They are different from diamond simulants such as moissanite and cubic zirconia.
Are all lab-grown diamonds certified?
No. A grading report depends on the individual item. Check the product listing or ask Roselle for the report details before purchase.
Are all lab-grown diamonds Type IIa?
No. Type classification varies. Verify the individual grading report instead of relying on a general statement.
Are lab-grown diamonds always environmentally friendly?
Environmental impact varies with energy source, technology and production. Roselle does not apply one universal environmental claim to every stone; ask for item-specific sourcing information where available.
Can I see a diamond before choosing?
Contact Roselle with the product or report number. We can confirm current availability and whether an in-store comparison can be arranged at Causeway Bay or Tsim Sha Tsui.
Educational references: GIA: natural and laboratory-grown diamonds and the grading report supplied for the individual stone.