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Round|Lab Grown|IGI

1.00ct J I1 Round Lab Grown Diamond

EX • J/I1

Diamond specifications and retailer prices

From £269 GBP
$360 USD
As of October 29, 2026
Save £802 GBP (75%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,071 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded J colour (near-colourless) and I1 clarity (included), with a top-tier cut grade and certified by IGI. Listed at 3 retailers as of October 29, 2026, with prices from £269 to £1,071, a £802 spread on the same certified stone. NZ Jewellers lists it at £1,071. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
J
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions6.49 × 6.52 × 3.87 mm
L/W Ratio1.00
Top View
6.49 mm6.52 mm1.00 ctJ / I1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 57.0%CrownGirdle: MediumPavilionCuletDepth 60.4%

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 29
Current: £1,071 GBP|Low: £258 GBP|High: £1,560 GBP|Avg: £645 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 10, 2026
Retailer 2£269 GBP
Retailer 3£312 GBP
Retailer 4£329 GBP
Retailer 5£334 GBP
NZ Jewellers£1,071 GBP
Retailer 6£1,560 GBP

3 data points across 6 retailers

3 retailers£269 GBP to £1,071 GBP

B+
Cheapest Retailer
-
£269 GBP
$360 USD
B+
Retailer 2
-
£312 GBP
$418 USD
View
Most Expensive
B
NZ Jewellers
933e2085-3eaf-46c9-91cb-b3468be82c17 · Oct 30
£1,071 GBP
$1,435 USD
View
2 more retailers have this diamond
Prices start from £269 GBPSave up to £802 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+
1.00ct Round
£269 GBP