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Round|Lab Grown|IGI

1.80ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG478122525

Shape and cutting style on the report: Round brilliant

Certificate IGI LG478122525

Diamond specifications and retailer prices

From £970 GBP
$1,300 USD
As of October 29, 2026
Save £2,479 GBP (72%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,449 GBP at MOH London · As of October 29, 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 LG478122525 or 478122525. Listed at 12 retailers as of October 29, 2026, with prices from £970 to £3,449, a £2,479 spread on the same certified stone. MOH London lists it at £3,449. 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 angle35.8°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG478122525
Dimensions7.77 × 7.80 × 4.76 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
7.77 mm7.80 mm1.80 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG478122525
Side View
Table 58.5%Crown 35.8°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 61.2%

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 29
Current: £3,449 GBP|Low: £828 GBP|High: £3,477 GBP|Avg: £1,744 GBP|+0.5%
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 9£970 GBP
Retailer 8£1,036 GBP
Retailer 12£1,127 GBP
Retailer 14£1,160 GBP
Retailer 3£1,202 GBP
Retailer 10£1,202 GBP
Retailer 7£1,328 GBP
Retailer 2£1,577 GBP
Retailer 5£1,650 GBP
Retailer 11£1,897 GBP
Retailer 4£2,180 GBP
Retailer 13£2,252 GBP
Retailer 6£3,438 GBP
MOH London£3,449 GBP

25 data points across 14 retailers

12 retailers£970 GBP to £3,449 GBP

A
Cheapest Retailer
-
£970 GBP
$1,300 USD
A
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 17 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
LG478122525 · Oct 29
£3,449 GBP
View
11 more retailers have this diamond
Prices start from £970 GBPSave up to £2,479 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
£970 GBP