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Round|Lab Grown|IGI

1.80ct J SI1 Round Lab Grown Diamond

ID • J/SI1 • IGI LG492113524

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492113524

Diamond specifications and retailer prices

From $1,667 SGD
$1,300 USD
As of October 28, 2026
Save $2,201 SGD (57%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $5,925 SGD at MOH London · As of October 19, 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 LG492113524 or 492113524. Listed at 12 retailers as of October 27, 2026, with a 132% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492113524
Dimensions7.90 × 7.83 × 4.71 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
7.90 mm7.83 mm1.80 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492113524
Side View
Table 56.0%Crown 33.1°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 60.0%

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 28
Current: $5,925 SGD|Low: $1,423 SGD|High: $5,964 SGD|Avg: $2,755 SGD|+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 29, 2026
Retailer 8$1,667 SGD
Retailer 7$1,780 SGD
Retailer 12$1,936 SGD
Retailer 11$1,992 SGD
Retailer 9$2,064 SGD
Retailer 14$2,064 SGD
Retailer 3$2,282 SGD
Retailer 6$2,707 SGD
Retailer 2$2,717 SGD
Retailer 5$2,835 SGD
Retailer 10$3,259 SGD
Retailer 4$3,745 SGD
Retailer 13$3,868 SGD
MOH London$5,925 SGD

36 data points across 14 retailers

12 retailers$1,667 SGD to $3,868 SGD

A
Cheapest Retailer
-
$1,667 SGD
$1,300 USD
A
Retailer 2
-
$1,780 SGD
$1,388 USD
View
B+
Retailer 3
-
$1,936 SGD
$1,510 USD
View
B+
Retailer 4
-
$1,992 SGD
$1,554 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,064 SGD
$1,610 USD
View
B+
Retailer 6
-
$2,064 SGD
$1,610 USD
View
Price last confirmed 16 days ago
B+
Retailer 7
-
$2,282 SGD
$1,780 USD
View
B+
Retailer 8
-
$2,717 SGD
£1,669 GBP
View
B
Retailer 9
-
$3,259 SGD
$2,542 USD
View
B
Retailer 10
-
$3,745 SGD
$2,921 USD
View
B
Retailer 11
-
$3,868 SGD
$3,017 USD
View
Most Expensive
B
MOH London
LG492113524 · Oct 19
$5,925 SGD
£3,639 GBP
View
Price last confirmed 10 days ago
11 more retailers have this diamond
Prices start from $1,667 SGDSave up to $2,201 SGD

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
$1,667 SGD