Emerald|Lab Grown|UNKNOWN

0.40ct J VS2 Emerald Lab Grown Diamond

ID • J/VS2 • UNKNOWN 27257257

Certificate UNKNOWN 27257257

Diamond specifications and retailer prices

From £139 GBP
$185 USD
As of October 27, 2026
Save £415 GBP (75%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £554 GBP at NZ Jewellers · As of October 28, 2026
View at NZ Jewellers

About this 0.4ct lab-grown emerald diamond

This 0.4ct lab-grown emerald sits in the sub-half-carat band, graded J colour (near-colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by UNKNOWN 27257257. Listed at 5 retailers as of October 27, 2026, with prices from £139 to £554, a £415 spread on the same certified stone. NZ Jewellers lists it at £554. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

0.40
Carat
J
Colour
VS2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryGood
FluorescenceNone
OriginLab Grown
Grading LabUNKNOWN
CertificateUNKNOWN 27257257
Dimensions4.87 × 3.42 × 2.37 mm
L/W Ratio1.42
Top View
4.87 mm3.42 mm0.40 ctJ / VS2
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateUNKNOWN 27257257
Side View
Table 77.2%CrownGirdlePavilionCuletDepth 69.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: £554 GBP|Low: £134 GBP|High: £554 GBP|Avg: £248 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 11, 2026
Retailer 2£139 GBP
Retailer 5£161 GBP
Retailer 3£172 GBP
Retailer 4£303 GBP
NZ Jewellers£554 GBP

8 data points across 5 retailers

5 retailers£139 GBP to £554 GBP

B+
Cheapest Retailer
-
£139 GBP
$185 USD
B+
Retailer 2
-
£161 GBP
$215 USD
View
B+
Retailer 3
-
£172 GBP
$229 USD
View
B
Retailer 4
-
£303 GBP
$404 USD
View
Most Expensive
C
NZ Jewellers
afbbeee8-d47f-4e3e-957b-59fc7e50d8fe · Oct 28
£554 GBP
$738 USD
View
4 more retailers have this diamond
Prices start from £139 GBPSave up to £415 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.

B+
0.40ct Emerald
£139 GBP