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Round Shaped Lab Grown Diamonds
To have this loose diamond set into jewellery, please view diamond settings and choose your preferred design. Whether purchased loose or as a finished piece, its diamond grading certificate will be included.
 

 

A round brilliant-cut diamond features 57 or 58 precisely proportioned facets, creating an exceptional balance of brilliance, fire and scintillation. Its symmetry can display the classic “Hearts and Arrows” pattern, combining optical precision with timeless beauty.
 

 

DAII™ Quality Guarantee
 

Standard diamonds are guaranteed a DAII™ score of 5.00 or higher, while Premium diamonds are guaranteed 7.00 or higher. DAII™ evaluates multiple specifications to indicate overall diamond quality—the higher the score, the better the quality. Learn more about DAII™
 

 

Images and videos are for reference only. The actual diamond may vary slightly from those shown.
 

 

For diamond specifications beyond the available options, please browse our Diamond Inventory.

Round Shaped Lab Grown Diamonds

From HK$1,000.00Sale Price
Quantity

RAGAZZA · LOOSE DIAMONDS

Choose your grade and carat.
We select the stone.

Start with your preferred shape, then choose the grade and carat above. Our team selects to the corresponding standard, reviewing report specifications, transparency and visible light together.

These products are loose diamonds, delivered with their corresponding reports. A suitable setting is ordered separately for finished jewellery.

Premium

Colour: D
The first grade on the D-to-Z scale, within the colourless range.
Clarity: VVS2 or above
Tiny inclusions are difficult to see at 10× magnification; eye-clean appearance and transparency are also reviewed.
Cut and finish: round diamonds 3X
Round diamonds have Excellent cut, polish and symmetry. Fancy shapes are reviewed for their outline, facets and visible light.
DAII™ round diamond assessment
16-point analysis of round brilliant proportions and overall quality.
Report: GIA · Gemological Institute of America
Every Premium loose diamond includes its corresponding GIA grading report.

Standard

Colour: D–F colourless
D, E or F colour, with F as the minimum, checked for unwanted colour casts.
Clarity: VS or above
Very slightly included or above, reviewed for an eye-clean appearance and transparency, excluding evident milkiness or haze.
Cut and finish: VG or above
Very Good or above in applicable cut and finish grading, with proportions, facet arrangement and visible light reviewed.
DAII™ round diamond assessment
16-point analysis of round brilliant proportions and overall quality.
Report: IGI · International Gemological Institute
Every Standard loose diamond includes its corresponding IGI grading report.

D, E and F are colourless grades. VVS2 means tiny inclusions are difficult to see at 10× magnification; VS means very slightly included. 3X means Excellent cut, polish and symmetry; VG means Very Good.

ROUND BRILLIANT DIAMONDS ONLY

DAII™ quality assessment for round diamonds

We use DAII™ to assess round-diamond proportions and overall quality, with video, direct observation and optical checks. We review other shapes for their outlines, ratios, facets and light distribution.

Explore DAII™ ↗Explore our selection checks ↗

INDEPENDENT ASSESSMENT

A corresponding report for every loose diamond

Premium includes a GIA report and Standard an IGI report. We match the diamond to its report before delivery and verify a laser inscription where present. Reports record specifications; our selection also examines the actual appearance.

GIAIGI

Would you like a finished piece?

Browse All Jewellery, choose a design and select its setting-only option, then order it together with this diamond. Contact us if you need help confirming that the diamond and design are compatible.

Choose a design ↗Diamond Search ↗Contact us ↗

BEFORE YOU CHOOSE

You may want to know

Does a loose diamond include a setting?

No. This product is delivered as a loose diamond with its report. For finished jewellery, order it together with a compatible design’s setting-only option.

How do the two grades differ?

Premium uses GIA, D colour and VVS2 clarity or above. Standard uses IGI, D–F colourless grades with F as the minimum, VS clarity or above and VG or above in applicable cut and finish. Both are reviewed for transparency, eye-clean appearance and proportions, and selected by our team to the stated requirements.

Does DAII™ apply to every shape?

DAII™ applies to round brilliant diamonds. We review other shapes for their outlines, proportions, facets and visible light.

Can I request a diamond outside the preset options?

Use Diamond Search to select a listed diamond or contact us about your requirements. A separately selected diamond follows its own stated specifications, grade and report.

When can I receive or collect my order?

Depending on availability, some in-stock pieces can be collected on the same day or prepared in around three working days. Standard production takes around three to four weeks, with transit time additional. After dispatch, delivery is around one to three days for Hong Kong and Macau and two to seven days for Taiwan and Malaysia. See the production and delivery information for other destinations. The confirmed order governs the delivery schedule.

For a particular date or an urgent order, please confirm availability, production and delivery arrangements with us before ordering.

Production and delivery ↗
Will I need to pay tax?

Orders for Hong Kong, Macau and Malaysia are tax-free; Taiwan tax is 5% of the total order amount. Import taxes for other destinations are payable by the customer. The local courier will notify you of the actual amount and collect it directly.

International orders ship from Hong Kong. For an estimate, use SimplyDuty with Hong Kong as the origin. Estimates are for reference only; the amount actually charged locally applies. Please contact us with any questions.

SimplyDuty import duty calculator ↗Payments and tax ↗
Do lab-grown and natural diamonds look different, and can they become cloudy?

Both are diamonds, with the same fundamental physical and optical properties. Normal unaided observation cannot reliably establish origin; professional testing is needed.

Normal wear does not gradually make the diamond itself cloudy. Surface oils, skincare products and everyday dirt can reduce its lustre, which appropriate cleaning can usually restore.

If anything still looks unusual after cleaning, or dirt is trapped around the setting, arrange a professional inspection and cleaning.

Explore lab-grown and natural diamond appearances ↗Diamond cleaning and care guide ↗
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