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Round|Lab Grown|IGI

1.80ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG492134037

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492134037

Diamond specifications and retailer prices

From £754 GBP
$1,010 USD
As of October 30, 2026
Save £2,682 GBP (78%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,436 GBP at MOH London · As of October 27, 2026
View at MOH London

About this 1.8ct lab-grown round diamond

This 1.8ct lab-grown round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG492134037 or 492134037. Listed at 12 retailers as of October 27, 2026, with prices from £754 to £3,436, a £2,682 spread on the same certified stone. MOH London lists it at £3,436. 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

1.80
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.2°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492134037
Dimensions7.69 × 7.72 × 4.87 mm
L/W Ratio1.00
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
7.69 mm7.72 mm1.80 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492134037
Side View
Table 55.5%Crown 36.2°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 63.2%

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: Oct 30
Current: £3,436 GBP|Low: £754 GBP|High: £3,472 GBP|Avg: £1,612 GBP|+0.1%
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
October 30, 2026
Retailer 2£754 GBP
Retailer 7£1,036 GBP
Retailer 11£1,127 GBP
Retailer 10£1,160 GBP
Retailer 8£1,202 GBP
Retailer 13£1,202 GBP
Retailer 3£1,328 GBP
Retailer 6£1,577 GBP
Retailer 5£1,650 GBP
Retailer 9£1,897 GBP
Retailer 4£2,180 GBP
Retailer 12£2,252 GBP
MOH London£3,436 GBP

39 data points across 13 retailers

12 retailers£754 GBP to £3,436 GBP

A
Cheapest Retailer
-
£754 GBP
$1,010 USD
B+
Retailer 2
-
£1,036 GBP
$1,388 USD
View
B+
Retailer 3
-
£1,127 GBP
$1,510 USD
View
B+
Retailer 4
-
£1,160 GBP
$1,554 USD
View
Final sale: no returns
Retailer 5
-
£1,202 GBP
$1,610 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
£1,202 GBP
$1,610 USD
View
B+
Retailer 7
-
£1,328 GBP
$1,780 USD
View
B+
Retailer 8
-
£1,577 GBP
View
B
Retailer 9
-
£1,897 GBP
$2,542 USD
View
B
Retailer 10
-
£2,180 GBP
$2,921 USD
View
B
Retailer 11
-
£2,252 GBP
$3,017 USD
View
Most Expensive
B
MOH London
LG492134037 · Oct 27
£3,436 GBP
View
11 more retailers have this diamond
Prices start from £754 GBPSave up to £2,682 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
1.80ct Round
£754 GBP