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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 $195 USD
As of November 1, 2026
Save $815 USD (81%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,074 USD 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 16 retailers as of November 1, 2026, with a 418% 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
Color
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

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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: Nov 1
Current: $1,074 USD|Low: $195 USD|High: $1,074 USD|Avg: $526 USD|+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 2, 2026
Retailer 11$195 USD
Retailer 10$216 USD
Retailer 3$292 USD
Retailer 4$387 USD
Retailer 8$395 USD
Retailer 7$400 USD
Retailer 2$548 USD
Retailer 9$615 USD
Retailer 6$660 USD
Retailer 5$1,010 USD
B2C Jewels$1,074 USD

42 data points across 11 retailers

16 retailers$195 USD to $1,010 USD

Retailer 1
-
$167 USD
Price last confirmed 28 days ago
A
Retailer 2
-
$195 USD
View
Final sale: no returns
Retailer 3
-
$213 USD
View
Price last confirmed 38 days ago
Retailer 4
-
$216 USD
View
Price last confirmed 30 days ago
B+
Retailer 5
-
$292 USD
View
A
Retailer 6
-
$387 USD
£304 GBP
View
A
Retailer 7
-
$395 USD
View
A
Retailer 8
-
$400 USD
€381 EUR
View
B+
Retailer 9
-
$548 USD
View
Retailer 10
-
$615 USD
View
Price last confirmed 26 days ago
B
Retailer 11
-
$627 USD
£493 GBP
View
B+
Retailer 12
-
$660 USD
View
B
Retailer 13
-
$709 USD
SGD 958 SGD
View
B
Retailer 14
-
$749 USD
View
B
Retailer 15
-
$1,010 USD
£795 GBP
View
Most Expensive
B2C Jewels
20884917 · Oct 26
$1,074 USD
View
Price last confirmed 7 days ago
15 more retailers have this diamond
Prices start from $195 USDSave up to $815 USD

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
$195 USD