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1.23ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG691548634

Shape and cutting style on the report: Round brilliant

Certificate IGI LG691548634

Diamond specifications and retailer prices

From €265 EUR
$296 USD
As of October 30, 2026
Save €675 EUR (72%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €940 EUR 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 LG691548634 or 691548634. Listed at 6 retailers as of October 29, 2026, with prices from €265 to €940, a €675 spread on the same certified stone. MOH London lists it at €940. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG691548634
Dimensions6.86 × 6.81 × 4.25 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.86 mm6.81 mm1.23 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG691548634
Side View
Table 59.0%Crown 34.4°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: €940 EUR|Low: €265 EUR|High: €947 EUR|Avg: €430 EUR|-0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 6€265 EUR
Retailer 4€328 EUR
Retailer 2€357 EUR
Retailer 3€394 EUR
Retailer 5€405 EUR
MOH London€940 EUR

40 data points across 6 retailers

6 retailers€265 EUR to €940 EUR

A
Cheapest Retailer
-
€265 EUR
$296 USD
B+
Retailer 2
-
€328 EUR
$366 USD
View
B+
Retailer 3
-
€357 EUR
£314 GBP
View
Retailer 4
-
€394 EUR
$440 USD
View
Price last confirmed 10 days ago
B+
Retailer 5
-
€405 EUR
$453 USD
View
Most Expensive
B
MOH London
LG691548634 · Oct 29
€940 EUR
£827 GBP
View
5 more retailers have this diamond
Prices start from €265 EURSave up to €675 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
€265 EUR