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1.23ct E SI2 Round Lab Grown Diamond

ID • E/SI2 • IGI LG488153826

Shape and cutting style on the report: Round brilliant

Certificate IGI LG488153826

Diamond specifications and retailer prices

From $237 USD
As of October 30, 2026
Save $901 USD (79%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,138 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG488153826 or 488153826. Listed at 8 retailers as of October 29, 2026, with prices from $237 to $1,138, a $901 spread on the same certified stone. MOH London lists it at $1,138. 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
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG488153826
Dimensions6.87 × 6.84 × 4.20 mm
L/W Ratio1.00
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
6.87 mm6.84 mm1.23 ctE / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG488153826
Side View
Table 59.5%Crown 35.4°Girdle: MediumPavilion 40.8°Culet: NoneDepth 61.3%

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: $1,138 USD|Low: $172 USD|High: $1,138 USD|Avg: $503 USD|+8.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 8$237 USD
Retailer 6$242 USD
Retailer 7$422 USD
Retailer 2$441 USD
Retailer 3$480 USD
Retailer 4$480 USD
Retailer 5$563 USD
MOH London$1,138 USD

40 data points across 8 retailers

8 retailers$237 USD to $1,138 USD

A
Cheapest Retailer
-
$237 USD
Final sale: no returns
Retailer 2
-
$242 USD
View
Price last confirmed 14 days ago
B+
Retailer 3
-
$422 USD
View
B+
Retailer 4
-
$441 USD
£347 GBP
View
B+
Retailer 5
-
$480 USD
View
Retailer 6
-
$480 USD
View
Price last confirmed 12 days ago
B+
Retailer 7
-
$563 USD
View
Most Expensive
B
MOH London
LG488153826 · Oct 29
$1,138 USD
£896 GBP
View
7 more retailers have this diamond
Prices start from $237 USDSave up to $901 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
$237 USD