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Round|Lab Grown|UNKNOWN

0.42ct D SI2 Round Lab Grown Diamond

EX • D/SI2 • UNKNOWN 3521592159

Certificate UNKNOWN 3521592159

Diamond specifications and retailer prices

From £172 GBP
As of November 5, 2026
Save £513 GBP (75%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £684 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.42ct lab-grown round diamond

This 0.42ct lab-grown round sits in the sub-half-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by UNKNOWN 3521592159. Listed at 5 retailers as of November 5, 2026, with prices from £172 to £684, a £513 spread on the same certified stone. NZ Jewellers lists it at £684. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.42
Carat
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabUNKNOWN
CertificateUNKNOWN 3521592159
Dimensions4.82 × 4.79 × 2.94 mm
L/W Ratio1.01
Top View
4.82 mm4.79 mm0.42 ctD / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateUNKNOWN 3521592159
Side View
Table 61.1%CrownGirdlePavilionCuletDepth 61.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £172 GBP|Low: £165 GBP|High: £361 GBP|Avg: £239 GBP|+4.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
October 10, 2026
Retailer 1£172 GBP
Retailer 4£199 GBP
Retailer 2£212 GBP
Retailer 3£361 GBP

4 data points across 4 retailers

5 retailers£172 GBP to £684 GBP

A
Cheapest Retailer
-
£172 GBP
B+
Retailer 2
-
£199 GBP
View
B+
Retailer 3
-
£212 GBP
View
B
Retailer 4
-
£361 GBP
View
Most Expensive
C
NZ Jewellers
b16cb346-7d38-4dc3-88dd-a1cfe13c42f9 · Nov 5
£684 GBP
$921 USD
View
4 more retailers have this diamond
Prices start from £172 GBPSave up to £513 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
0.42ct Round
£172 GBP