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Radiant|Lab Grown|IGI

1.21ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG534238077

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG534238077

Diamond specifications and retailer prices

From $250 SGD
As of November 6, 2026
Save $1,041 SGD (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,376 SGD at B2C Jewels · As of October 26, 2026
View at B2C Jewels

About this 1.21ct lab-grown radiant diamond

This 1.21ct lab-grown radiant 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 LG534238077 or 534238077. Listed at 18 retailers as of November 5, 2026, with a 416% 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

1.21
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.4°
Pavilion angle30.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG534238077
Dimensions7.55 × 5.24 × 3.43 mm
L/W Ratio1.44
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.55 mm5.24 mm1.21 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG534238077
Side View
Table 64.0%Crown 41.4°Girdle: Slightly ThickPavilion 30.1°Culet: NoneDepth 65.5%

Caratlytics Score

How it works →
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: Nov 6
Current: $1,376 SGD|Low: $250 SGD|High: $1,376 SGD|Avg: $676 SGD|+4.6%
B2C Jewels
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 11$250 SGD
Retailer 10$277 SGD
Retailer 3$374 SGD
Retailer 2$490 SGD
Retailer 8$506 SGD
Retailer 7$513 SGD
Retailer 9$788 SGD
Retailer 6$939 SGD
Retailer 4$1,077 SGD
Retailer 5$1,291 SGD
B2C Jewels$1,376 SGD

42 data points across 11 retailers

18 retailers$250 SGD to $1,291 SGD

Retailer 1
-
$214 SGD
Price last confirmed 33 days ago
A
Retailer 2
-
$250 SGD
View
Final sale: no returns
Retailer 3
-
$273 SGD
View
Price last confirmed 43 days ago
Retailer 4
-
$277 SGD
View
Price last confirmed 35 days ago
B+
Retailer 5
-
$374 SGD
View
A
Retailer 6
-
$490 SGD
View
A
Retailer 7
-
$506 SGD
View
A
Retailer 8
-
$513 SGD
View
B+
Retailer 9
-
$702 SGD
View
Retailer 10
-
$788 SGD
View
Price last confirmed 31 days ago
B
Retailer 11
-
$802 SGD
View
B+
Retailer 12
-
$846 SGD
View
B
Retailer 13
-
$907 SGD
View
B
Retailer 14
-
$939 SGD
View
B
Retailer 15
-
$959 SGD
View
B
Retailer 16
-
$1,077 SGD
View
B
Retailer 17
-
$1,291 SGD
View
Most Expensive
B2C Jewels
20884917 · Oct 26
$1,376 SGD
$1,074 USD
View
Price last confirmed 11 days ago
17 more retailers have this diamond
Prices start from $250 SGDSave up to $1,041 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 Radiant
$250 SGD