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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 €194 EUR
$217 USD
As of October 30, 2026
Save €804 EUR (81%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €998 EUR at MOH London · As of November 1, 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 October 30, 2026, with prices from €194 to €998, a €804 spread on the same certified stone. MOH London lists it at €998. 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
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: €998 EUR|Low: €194 EUR|High: €1,011 EUR|Avg: €449 EUR|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 6€194 EUR
Retailer 4€261 EUR
Retailer 3€376 EUR
Retailer 2€388 EUR
Retailer 5€482 EUR
MOH London€998 EUR

35 data points across 6 retailers

6 retailers€194 EUR to €998 EUR

A
Cheapest Retailer
-
€194 EUR
$217 USD
B+
Retailer 2
-
€261 EUR
$292 USD
View
Retailer 3
-
€376 EUR
$420 USD
View
B+
Retailer 4
-
€388 EUR
£341 GBP
View
B
Retailer 5
-
€482 EUR
$539 USD
View
Most Expensive
B
MOH London
LG673424429 · Nov 1
€998 EUR
£878 GBP
View
5 more retailers have this diamond
Prices start from €194 EURSave up to €804 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 Round
€194 EUR