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Round|Lab Grown|IGI

1.21ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG598387229

Shape and cutting style on the report: Round brilliant

Certificate IGI LG598387229

Diamond specifications and retailer prices

From $590 SGD
As of November 1, 2026
Save $1,342 SGD (69%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,932 SGD at MOH London · As of November 5, 2026
View at MOH London

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG598387229 or 598387229. Listed at 9 retailers as of November 1, 2026, with prices from $590 to $1,932, a $1,342 spread on the same certified stone. MOH London lists it at $1,932. 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

1.21
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG598387229
Dimensions6.94 × 6.88 × 4.17 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
6.94 mm6.88 mm1.21 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG598387229
Side View
Table 60.0%Crown 32.7°Girdle: MediumPavilion 41.2°Culet: NoneDepth 60.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $1,932 SGD|Low: $312 SGD|High: $1,960 SGD|Avg: $733 SGD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 11$374 SGD
Retailer 12$437 SGD
Retailer 3$452 SGD
Retailer 4$476 SGD
Retailer 10$483 SGD
Retailer 8$590 SGD
Retailer 5$683 SGD
Retailer 6$703 SGD
Retailer 9$788 SGD
Retailer 2$843 SGD
Retailer 7$1,484 SGD
MOH London$1,932 SGD

37 data points across 12 retailers

9 retailers$590 SGD to $1,932 SGD

B+
Cheapest Retailer
-
$590 SGD
B+
Retailer 2
-
$683 SGD
View
B
Retailer 3
-
$703 SGD
View
B+
Retailer 4
-
$788 SGD
View
B
Retailer 5
-
$843 SGD
View
B
Retailer 6
-
$1,484 SGD
View
Retailer 7
-
$1,553 SGD
View
Price last confirmed 46 days ago
B
Retailer 8
-
$1,613 SGD
View
Most Expensive
B
MOH London
LG598387229 · Nov 5
$1,932 SGD
£1,191 GBP
View
8 more retailers have this diamond
Prices start from $590 SGDSave up to $1,342 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.

B+
1.21ct Round
$590 SGD