CaratHunter
Plans
Round|Lab Grown|IGI

1.21ct G SI2 Round Lab Grown Diamond

ID • G/SI2 • IGI LG673424429

Shape and cutting style on the report: Round brilliant

Certificate IGI LG673424429

Diamond specifications and retailer prices

From $277 SGD
As of November 5, 2026
Save $1,144 SGD (80%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,421 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG673424429 or 673424429. Listed at 6 retailers as of November 5, 2026, with prices from $277 to $1,421, a $1,144 spread on the same certified stone. MOH London lists it at $1,421. 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
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG673424429
Dimensions6.90 × 6.88 × 4.12 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.90 mm6.88 mm1.21 ctG / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG673424429
Side View
Table 58.0%Crown 33.1°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 59.8%

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: $1,421 SGD|Low: $277 SGD|High: $1,442 SGD|Avg: $641 SGD|-1.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6$277 SGD
Retailer 4$373 SGD
Retailer 3$517 SGD
Retailer 2$548 SGD
Retailer 5$688 SGD
MOH London$1,421 SGD

40 data points across 6 retailers

6 retailers$277 SGD to $1,421 SGD

A
Cheapest Retailer
-
$277 SGD
B+
Retailer 2
-
$373 SGD
View
B+
Retailer 3
-
$517 SGD
View
B+
Retailer 4
-
$548 SGD
View
B
Retailer 5
-
$688 SGD
View
Most Expensive
B
MOH London
LG673424429 · Nov 5
$1,421 SGD
£876 GBP
View
5 more retailers have this diamond
Prices start from $277 SGDSave up to $1,144 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
1.21ct Round
$277 SGD