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
As of November 6, 2026
Save €727 EUR (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: €962 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 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

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: €962 EUR|Low: €175 EUR|High: €962 EUR|Avg: €473 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
November 6, 2026
Retailer 11€175 EUR
Retailer 10€193 EUR
Retailer 3€262 EUR
Retailer 2€342 EUR
Retailer 8€354 EUR
Retailer 7€358 EUR
Retailer 9€551 EUR
Retailer 6€657 EUR
Retailer 4€752 EUR
Retailer 5€902 EUR
B2C Jewels€962 EUR

42 data points across 11 retailers

18 retailers€175 EUR to €902 EUR

Retailer 1
-
€150 EUR
Price last confirmed 33 days ago
A
Retailer 2
-
€175 EUR
View
Final sale: no returns
Retailer 3
-
€191 EUR
View
Price last confirmed 43 days ago
Retailer 4
-
€193 EUR
View
Price last confirmed 35 days ago
B+
Retailer 5
-
€262 EUR
View
A
Retailer 6
-
€342 EUR
View
A
Retailer 7
-
€354 EUR
View
A
Retailer 8
-
€358 EUR
View
B+
Retailer 9
-
€491 EUR
View
Retailer 10
-
€551 EUR
View
Price last confirmed 31 days ago
B
Retailer 11
-
€561 EUR
View
B+
Retailer 12
-
€591 EUR
View
B
Retailer 13
-
€634 EUR
View
B
Retailer 14
-
€657 EUR
View
B
Retailer 15
-
€670 EUR
View
B
Retailer 16
-
€752 EUR
View
B
Retailer 17
-
€902 EUR
View
Most Expensive
B2C Jewels
20884917 · Oct 26
€962 EUR
$1,074 USD
View
Price last confirmed 11 days ago
17 more retailers have this diamond
Prices start from €175 EURSave up to €727 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