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Round|Lab Grown|IGI

1.80ct J SI2 Round Lab Grown Diamond

EX • J/SI2 • IGI LG451057428

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451057428

Diamond specifications and retailer prices

From $1,252 USD
As of October 29, 2026
Save $3,420 USD (73%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,672 USD 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451057428 or 451057428. Listed at 10 retailers as of October 27, 2026, with prices from $1,252 to $4,672, a $3,420 spread on the same certified stone. MOH London lists it at $4,672. 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
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057428
Dimensions7.74 × 7.77 × 4.79 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.74 mm7.77 mm1.80 ctJ / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451057428
Side View
Table 57.0%Crown 36.4°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 61.8%

Caratlytics Score

How it works →
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: $4,672 USD|Low: $1,252 USD|High: $4,729 USD|Avg: $2,340 USD|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 27, 2026
Retailer 2$1,252 USD
Retailer 3$1,280 USD
Retailer 6$1,401 USD
Retailer 4$1,452 USD
Retailer 8$2,024 USD
Retailer 5$2,302 USD
Retailer 7$2,707 USD
Retailer 9$3,248 USD
MOH London$4,672 USD

13 data points across 9 retailers

10 retailers$1,252 USD to $4,672 USD

A
Cheapest Retailer
-
$1,252 USD
A
Retailer 2
-
$1,280 USD
View
A
Retailer 3
-
$1,362 USD
View
A
Retailer 4
-
$1,401 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,452 USD
View
Retailer 6
-
$1,452 USD
View
Price last confirmed 17 days ago
B
Retailer 7
-
$2,302 USD
View
B
Retailer 8
-
$2,707 USD
View
B
Retailer 9
-
$2,723 USD
View
Most Expensive
B
MOH London
LG451057428 · Oct 27
$4,672 USD
£3,679 GBP
View
9 more retailers have this diamond
Prices start from $1,252 USDSave up to $3,420 USD

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
$1,252 USD