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Round|Lab Grown|IGI

3.00ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG485136521

Shape and cutting style on the report: Round brilliant

Certificate IGI LG485136521

Diamond specifications and retailer prices

From £1,248 GBP
As of November 5, 2026
Save £8,048 GBP (87%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £9,296 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 3ct lab-grown round diamond

This 3ct lab-grown round sits in the three to five carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG485136521 or 485136521. Listed at 11 retailers as of November 5, 2026, with prices from £1,248 to £9,296, a £8,048 spread on the same certified stone. MOH London lists it at £9,296. 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

3.00
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG485136521
Dimensions9.31 × 9.24 × 5.53 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.31 mm9.24 mm3.00 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG485136521
Side View
Table 61.5%Crown 34.1°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 59.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £9,296 GBP|Low: £1,248 GBP|High: £9,446 GBP|Avg: £5,271 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 2£1,248 GBP
Retailer 4£3,949 GBP
Retailer 7£4,423 GBP
Retailer 5£4,581 GBP
Retailer 8£4,592 GBP
Retailer 9£4,902 GBP
Retailer 3£5,642 GBP
Retailer 6£7,076 GBP
MOH London£9,296 GBP

17 data points across 9 retailers

11 retailers£1,248 GBP to £9,296 GBP

A
Cheapest Retailer
-
£1,248 GBP
B+
Retailer 2
-
£3,949 GBP
View
B+
Retailer 3
-
£4,138 GBP
View
B+
Retailer 4
-
£4,423 GBP
View
Final sale: no returns
Retailer 5
-
£4,581 GBP
View
Price last confirmed 25 days ago
B+
Retailer 6
-
£4,581 GBP
View
B+
Retailer 7
-
£4,592 GBP
View
B
Retailer 8
-
£5,438 GBP
View
B
Retailer 9
-
£5,642 GBP
View
B
Retailer 10
-
£7,076 GBP
View
Most Expensive
B
MOH London
LG485136521 · Nov 5
£9,296 GBP
View
10 more retailers have this diamond
Prices start from £1,248 GBPSave up to £8,048 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
3.00ct Round
£1,248 GBP