CaratHunter
Plans
Round|Lab Grown|IGI

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 €143 EUR
$160 USD
As of October 29, 2026
Save €691 EUR (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: €834 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 LG729575214 or 729575214. Listed at 16 retailers as of October 29, 2026, with prices from €143 to €834, a €691 spread on the same certified stone. MOH London lists it at €834. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: €834 EUR|Low: €136 EUR|High: €834 EUR|Avg: €381 EUR|+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
Retailer 15
Retailer 16
October 31, 2026
Retailer 3€143 EUR
Retailer 16€159 EUR
Retailer 11€166 EUR
Retailer 13€177 EUR
Retailer 14€177 EUR
Retailer 10€310 EUR
Retailer 2€312 EUR
Retailer 7€321 EUR
Retailer 12€340 EUR
Retailer 9€418 EUR
Retailer 6€469 EUR
Retailer 8€510 EUR
Retailer 4€570 EUR
Retailer 15€602 EUR
Retailer 5€620 EUR
MOH London€834 EUR

43 data points across 16 retailers

16 retailers€143 EUR to €834 EUR

A
Cheapest Retailer
-
€143 EUR
$160 USD
A
Retailer 2
-
€159 EUR
$178 USD
View
Final sale: no returns
A
Retailer 3
-
€166 EUR
$185 USD
View
A
Retailer 4
-
€177 EUR
$198 USD
View
A
Retailer 5
-
€177 EUR
$198 USD
View
A
Retailer 6
-
€310 EUR
View
A
Retailer 7
-
€312 EUR
£274 GBP
View
B+
Retailer 8
-
€321 EUR
$359 USD
View
B+
Retailer 9
-
€340 EUR
$380 USD
View
B+
Retailer 10
-
€418 EUR
A$718 AUD
View
B+
Retailer 11
-
€469 EUR
$524 USD
View
B+
Retailer 12
-
€510 EUR
$570 USD
View
B
Retailer 13
-
€570 EUR
$637 USD
View
B
Retailer 14
-
€602 EUR
$673 USD
View
B
Retailer 15
-
€620 EUR
$692 USD
View
Most Expensive
B
MOH London
LG729575214 · Oct 29
€834 EUR
£734 GBP
View
15 more retailers have this diamond
Prices start from €143 EURSave up to €691 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
€143 EUR