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Round|Lab Grown|IGI

1.23ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG529269207

Shape and cutting style on the report: Round brilliant

Certificate IGI LG529269207

Diamond specifications and retailer prices

From €158 EUR
As of November 5, 2026
Save €754 EUR (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €912 EUR at MOH London · As of November 2, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG529269207 or 529269207. Listed at 11 retailers as of November 2, 2026, with prices from €158 to €912, a €754 spread on the same certified stone. MOH London lists it at €912. 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
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG529269207
Dimensions6.84 × 6.80 × 4.24 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
6.84 mm6.80 mm1.23 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG529269207
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 62.2%

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 5
Current: €912 EUR|Low: €151 EUR|High: €1,225 EUR|Avg: €539 EUR|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
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Retailer 17
November 6, 2026
Retailer 11€158 EUR
Retailer 15€176 EUR
Retailer 16€183 EUR
Retailer 17€307 EUR
Retailer 2€323 EUR
Retailer 13€346 EUR
Retailer 7€429 EUR
Retailer 5€486 EUR
Retailer 8€499 EUR
Retailer 6€521 EUR
Retailer 14€627 EUR
Retailer 9€632 EUR
Retailer 10€663 EUR
Retailer 12€855 EUR
Retailer 3€895 EUR
MOH London€912 EUR
Retailer 4€1,225 EUR

21 data points across 17 retailers

11 retailers€158 EUR to €912 EUR

A
Cheapest Retailer
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€158 EUR
A
Retailer 2
-
€176 EUR
View
Final sale: no returns
A
Retailer 3
-
€183 EUR
View
A
Retailer 4
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€307 EUR
View
A
Retailer 5
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€323 EUR
View
A
Retailer 6
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€346 EUR
View
B
Retailer 7
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€627 EUR
View
B
Retailer 8
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€663 EUR
View
B
Retailer 9
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€855 EUR
View
B
Retailer 10
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€895 EUR
View
Most Expensive
B
MOH London
LG529269207 · Nov 2
€912 EUR
£806 GBP
View
10 more retailers have this diamond
Prices start from €158 EURSave up to €754 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
€158 EUR