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Round|Lab Grown|IGI

1.23ct G SI2 Round Lab Grown Diamond

ID • G/SI2 • IGI LG490195521

Shape and cutting style on the report: Round brilliant

Certificate IGI LG490195521

Diamond specifications and retailer prices

From €212 EUR
$237 USD
As of October 30, 2026
Save €806 EUR (79%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: €1,019 EUR at MOH London · As of October 29, 2026
View at MOH London

About this 1.23ct lab-grown round diamond

This 1.23ct 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 LG490195521 or 490195521. Listed at 8 retailers as of October 29, 2026, with prices from €212 to €1,019, a €806 spread on the same certified stone. MOH London lists it at €1,019. 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

1.23
Carat
G
Color
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG490195521
Dimensions7.02 × 6.98 × 4.19 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.02 mm6.98 mm1.23 ctG / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG490195521
Side View
Table 59.0%Crown 33.4°Girdle: THN-MEDPavilion 41.1°Culet: NoneDepth 59.9%

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: €1,019 EUR|Low: €151 EUR|High: €1,019 EUR|Avg: €424 EUR|+8.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 8€212 EUR
Retailer 6€217 EUR
Retailer 3€265 EUR
Retailer 7€378 EUR
Retailer 4€380 EUR
Retailer 2€395 EUR
Retailer 5€504 EUR
MOH London€1,019 EUR

38 data points across 8 retailers

8 retailers€212 EUR to €1,019 EUR

A
Cheapest Retailer
-
€212 EUR
$237 USD
Final sale: no returns
Retailer 2
-
€217 EUR
$242 USD
View
Price last confirmed 16 days ago
A
Retailer 3
-
€265 EUR
$296 USD
View
B+
Retailer 4
-
€378 EUR
$422 USD
View
Retailer 5
-
€380 EUR
$425 USD
View
Price last confirmed 10 days ago
B+
Retailer 6
-
€395 EUR
£347 GBP
View
B
Retailer 7
-
€504 EUR
$563 USD
View
Most Expensive
B
MOH London
LG490195521 · Oct 29
€1,019 EUR
£896 GBP
View
7 more retailers have this diamond
Prices start from €212 EURSave up to €806 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
1.23ct Round
€212 EUR