Round|Lab Grown|IGI

1.23ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG561281096

Shape and cutting style on the report: Round brilliant

Certificate IGI LG561281096

Diamond specifications and retailer prices

From $262 USD
As of November 1, 2026
Save $649 USD (71%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $911 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 LG561281096 or 561281096. Listed at 7 retailers as of October 29, 2026, with prices from $262 to $911, a $649 spread on the same certified stone. MOH London lists it at $911. 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 angle35.4°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG561281096
Dimensions6.85 × 6.81 × 4.22 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.85 mm6.81 mm1.23 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG561281096
Side View
Table 57.0%Crown 35.4°Girdle: MED-STKPavilion 40.5°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: Nov 1
Current: $911 USD|Low: $262 USD|High: $922 USD|Avg: $494 USD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 6$262 USD
Retailer 2$339 USD
Retailer 7$379 USD
Retailer 5$440 USD
Retailer 3$520 USD
Retailer 4$678 USD
MOH London$911 USD

39 data points across 7 retailers

7 retailers$262 USD to $911 USD

B+
Cheapest Retailer
-
$262 USD
A
Retailer 2
-
$339 USD
£267 GBP
View
A
Retailer 3
-
$379 USD
View
Retailer 4
-
$440 USD
View
Price last confirmed 11 days ago
B+
Retailer 5
-
$520 USD
View
B
Retailer 6
-
$678 USD
View
Most Expensive
B
MOH London
LG561281096 · Oct 29
$911 USD
£717 GBP
View
6 more retailers have this diamond
Prices start from $262 USDSave up to $649 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
$262 USD