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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 €175 EUR
$195 USD
As of October 30, 2026
Save €787 EUR (82%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: €961 EUR 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 October 26, 2026, with prices from €175 to €961, a €787 spread on the same certified stone. B2C Jewels lists it at €961. 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: Oct 30
Current: €961 EUR|Low: €175 EUR|High: €961 EUR|Avg: €466 EUR|+4.6%
B2C Jewels
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 11€175 EUR
Retailer 10€193 EUR
Retailer 3€261 EUR
Retailer 2€346 EUR
Retailer 8€354 EUR
Retailer 6€358 EUR
Retailer 7€484 EUR
Retailer 9€550 EUR
Retailer 4€591 EUR
Retailer 5€908 EUR
B2C Jewels€961 EUR

40 data points across 11 retailers

16 retailers€175 EUR to €961 EUR

Retailer 1
-
€149 EUR
$167 USD
Price last confirmed 27 days ago
A
Retailer 2
-
€175 EUR
$195 USD
View
Final sale: no returns
Retailer 3
-
€191 EUR
$213 USD
View
Price last confirmed 37 days ago
Retailer 4
-
€193 EUR
$216 USD
View
Price last confirmed 29 days ago
B+
Retailer 5
-
€261 EUR
$292 USD
View
A
Retailer 6
-
€346 EUR
£304 GBP
View
A
Retailer 7
-
€354 EUR
$395 USD
View
Retailer 8
-
€358 EUR
View
Price last confirmed 9 days ago
B+
Retailer 9
-
€484 EUR
$541 USD
View
Retailer 10
-
€550 EUR
$615 USD
View
Price last confirmed 25 days ago
B
Retailer 11
-
€561 EUR
£493 GBP
View
B+
Retailer 12
-
€591 EUR
$660 USD
View
B
Retailer 13
-
€635 EUR
SGD 958 SGD
View
B
Retailer 14
-
€670 EUR
$749 USD
View
B
Retailer 15
-
€908 EUR
£799 GBP
View
Most Expensive
B
B2C Jewels
20884917 · Oct 26
€961 EUR
$1,074 USD
View
15 more retailers have this diamond
Prices start from €175 EURSave up to €787 EUR

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
€175 EUR