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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 $177 USD
As of November 5, 2026
Save $847 USD (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,024 USD 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 $177 to $1,024, a $847 spread on the same certified stone. MOH London lists it at $1,024. 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
Color
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

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: Nov 5
Current: $1,024 USD|Low: $170 USD|High: $1,375 USD|Avg: $605 USD|-1.1%
MOH London
Retailer 2
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Retailer 17
November 6, 2026
Retailer 11$177 USD
Retailer 15$198 USD
Retailer 16$205 USD
Retailer 17$345 USD
Retailer 2$362 USD
Retailer 13$388 USD
Retailer 7$482 USD
Retailer 5$546 USD
Retailer 8$560 USD
Retailer 6$585 USD
Retailer 14$704 USD
Retailer 9$709 USD
Retailer 10$744 USD
Retailer 12$960 USD
Retailer 3$1,005 USD
MOH London$1,024 USD
Retailer 4$1,375 USD

21 data points across 17 retailers

11 retailers$177 USD to $1,024 USD

A
Cheapest Retailer
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$177 USD
A
Retailer 2
-
$198 USD
View
Final sale: no returns
A
Retailer 3
-
$205 USD
View
A
Retailer 4
-
$345 USD
View
A
Retailer 5
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$362 USD
View
A
Retailer 6
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$388 USD
View
B
Retailer 7
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$704 USD
View
B
Retailer 8
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$744 USD
View
B
Retailer 9
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$960 USD
View
B
Retailer 10
-
$1,005 USD
View
Most Expensive
B
MOH London
LG529269207 · Nov 2
$1,024 USD
£806 GBP
View
10 more retailers have this diamond
Prices start from $177 USDSave up to $847 USD

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
$177 USD