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Round|Lab Grown|IGI

1.65ct J SI2 Round Lab Grown Diamond

ID • J/SI2 • IGI LG440012524

Shape and cutting style on the report: Round brilliant

Certificate IGI LG440012524

Diamond specifications and retailer prices

From £687 GBP
$920 USD
As of October 30, 2026
Save £2,517 GBP (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,204 GBP at MOH London · As of October 27, 2026
View at MOH London

About this 1.65ct lab-grown round diamond

This 1.65ct lab-grown round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG440012524 or 440012524. Listed at 11 retailers as of October 27, 2026, with prices from £687 to £3,204, a £2,517 spread on the same certified stone. MOH London lists it at £3,204. 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

1.65
Carat
J
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440012524
Dimensions7.54 × 7.51 × 4.64 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.54 mm7.51 mm1.65 ctJ / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG440012524
Side View
Table 59.0%Crown 36.1°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 61.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £3,204 GBP|Low: £687 GBP|High: £3,242 GBP|Avg: £1,430 GBP|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 30, 2026
Retailer 2£687 GBP
Retailer 8£858 GBP
Retailer 11£934 GBP
Retailer 13£961 GBP
Retailer 9£996 GBP
Retailer 14£996 GBP
Retailer 5£1,092 GBP
Retailer 7£1,159 GBP
Retailer 4£1,422 GBP
Retailer 10£1,581 GBP
Retailer 12£1,867 GBP
Retailer 3£1,962 GBP
Retailer 6£2,227 GBP
MOH London£3,204 GBP

23 data points across 14 retailers

11 retailers£687 GBP to £3,204 GBP

A
Cheapest Retailer
-
£687 GBP
$920 USD
B+
Retailer 2
-
£858 GBP
$1,150 USD
View
B+
Retailer 3
-
£934 GBP
$1,251 USD
View
B+
Retailer 4
-
£961 GBP
$1,288 USD
View
Final sale: no returns
B+
Retailer 5
-
£996 GBP
$1,334 USD
View
Retailer 6
-
£996 GBP
$1,334 USD
View
Price last confirmed 18 days ago
B+
Retailer 7
-
£1,159 GBP
View
B
Retailer 8
-
£1,581 GBP
$2,119 USD
View
B
Retailer 9
-
£1,867 GBP
$2,501 USD
View
B
Retailer 10
-
£1,962 GBP
$2,629 USD
View
Most Expensive
B
MOH London
LG440012524 · Oct 27
£3,204 GBP
View
10 more retailers have this diamond
Prices start from £687 GBPSave up to £2,517 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
1.65ct Round
£687 GBP