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Round|Lab Grown|IGI

1.80ct J SI1 Round Lab Grown Diamond

ID • J/SI1 • IGI LG497155955

Shape and cutting style on the report: Round brilliant

Certificate IGI LG497155955

Diamond specifications and retailer prices

From $1,666 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: $5,923 SGD at MOH London · As of October 21, 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 LG497155955 or 497155955. 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 angle33.3°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG497155955
Dimensions7.88 × 7.90 × 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
7.88 mm7.90 mm1.80 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG497155955
Side View
Table 57.5%Crown 33.3°Girdle: THN-MEDPavilion 40.6°Culet: NoneDepth 60.4%

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: $5,923 SGD|Low: $1,666 SGD|High: $5,971 SGD|Avg: $2,763 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
October 29, 2026
Retailer 7$1,666 SGD
Retailer 6$1,779 SGD
Retailer 11$1,935 SGD
Retailer 10$1,992 SGD
Retailer 8$2,064 SGD
Retailer 13$2,064 SGD
Retailer 3$2,281 SGD
Retailer 2$2,716 SGD
Retailer 5$2,834 SGD
Retailer 9$3,258 SGD
Retailer 4$3,744 SGD
Retailer 12$3,867 SGD
MOH London$5,923 SGD

23 data points across 13 retailers

12 retailers$1,666 SGD to $3,867 SGD

A
Cheapest Retailer
-
$1,666 SGD
$1,300 USD
A
Retailer 2
-
$1,779 SGD
$1,388 USD
View
B+
Retailer 3
-
$1,935 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
-
$2,281 SGD
$1,780 USD
View
B+
Retailer 8
-
$2,716 SGD
£1,669 GBP
View
B
Retailer 9
-
$3,258 SGD
$2,542 USD
View
B
Retailer 10
-
$3,744 SGD
$2,921 USD
View
B
Retailer 11
-
$3,867 SGD
$3,017 USD
View
Most Expensive
B
MOH London
LG497155955 · Oct 21
$5,923 SGD
£3,639 GBP
View
Price last confirmed 8 days ago
11 more retailers have this diamond
Prices start from $1,666 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
$1,666 SGD