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Round|Lab Grown|IGI

1.20ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG451056607

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451056607

Diamond specifications and retailer prices

From $881 SGD
As of November 5, 2026
Save $4,412 SGD (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $5,293 SGD at MOH London · As of November 5, 2026
View at MOH London

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451056607 or 451056607. Listed at 13 retailers as of November 5, 2026, with prices from $881 to $5,293, a $4,412 spread on the same certified stone. MOH London lists it at $5,293. 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

1.20
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451056607
Dimensions6.85 × 6.89 × 4.17 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.85 mm6.89 mm1.20 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451056607
Side View
Table 60.0%Crown 32.2°GirdlePavilion 41.5°Culet: NoneDepth 60.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $5,293 SGD|Low: $881 SGD|High: $5,371 SGD|Avg: $2,232 SGD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 5$881 SGD
Retailer 6$1,424 SGD
Retailer 11$1,549 SGD
Retailer 10$1,595 SGD
Retailer 7$1,652 SGD
Retailer 9$1,652 SGD
Retailer 2$1,896 SGD
Retailer 8$2,627 SGD
Retailer 4$2,808 SGD
Retailer 3$3,096 SGD
MOH London$5,293 SGD

45 data points across 11 retailers

13 retailers$881 SGD to $5,293 SGD

A
Cheapest Retailer
-
$881 SGD
B+
Retailer 2
-
$1,424 SGD
View
B+
Retailer 3
-
$1,549 SGD
View
B+
Retailer 4
-
$1,595 SGD
View
Final sale: no returns
Retailer 5
-
$1,652 SGD
View
Price last confirmed 25 days ago
B+
Retailer 6
-
$1,652 SGD
View
B+
Retailer 7
-
$1,871 SGD
View
B+
Retailer 8
-
$1,896 SGD
View
B
Retailer 9
-
$2,627 SGD
View
B
Retailer 10
-
$2,808 SGD
View
B
Retailer 11
-
$3,096 SGD
View
B
Retailer 12
-
$3,350 SGD
View
Most Expensive
B
MOH London
LG451056607 · Nov 5
$5,293 SGD
£3,263 GBP
View
12 more retailers have this diamond
Prices start from $881 SGDSave up to $4,412 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
1.20ct Round
$881 SGD