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1.23ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG729575214

Shape and cutting style on the report: Round brilliant

Certificate IGI LG729575214

Diamond specifications and retailer prices

From $160 USD
As of October 29, 2026
Save $772 USD (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $932 USD 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG729575214 or 729575214. Listed at 16 retailers as of October 29, 2026, with prices from $160 to $932, a $772 spread on the same certified stone. MOH London lists it at $932. 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
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG729575214
Dimensions6.88 × 6.85 × 4.24 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
6.88 mm6.85 mm1.23 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG729575214
Side View
Table 58.0%Crown 35°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.7%

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 29
Current: $932 USD|Low: $152 USD|High: $932 USD|Avg: $426 USD|+1.7%
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 16
November 1, 2026
Retailer 3$160 USD
Retailer 16$178 USD
Retailer 11$185 USD
Retailer 13$198 USD
Retailer 14$198 USD
Retailer 10$347 USD
Retailer 2$348 USD
Retailer 7$359 USD
Retailer 12$380 USD
Retailer 9$467 USD
Retailer 6$524 USD
Retailer 8$570 USD
Retailer 4$637 USD
Retailer 15$673 USD
Retailer 5$692 USD
MOH London$932 USD

44 data points across 16 retailers

16 retailers$160 USD to $932 USD

A
Cheapest Retailer
-
$160 USD
A
Retailer 2
-
$178 USD
View
Final sale: no returns
A
Retailer 3
-
$185 USD
View
A
Retailer 4
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$198 USD
View
A
Retailer 5
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$198 USD
View
A
Retailer 6
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$347 USD
€330 EUR
View
A
Retailer 7
-
$348 USD
£274 GBP
View
B+
Retailer 8
-
$359 USD
View
B+
Retailer 9
-
$380 USD
View
B+
Retailer 10
-
$467 USD
A$718 AUD
View
B+
Retailer 11
-
$524 USD
View
B+
Retailer 12
-
$570 USD
View
B
Retailer 13
-
$637 USD
View
B
Retailer 14
-
$673 USD
View
B
Retailer 15
-
$692 USD
View
Most Expensive
B
MOH London
LG729575214 · Oct 29
$932 USD
£734 GBP
View
15 more retailers have this diamond
Prices start from $160 USDSave up to $772 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
$160 USD