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
As of November 5, 2026
Save €683 EUR (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: €826 EUR at MOH London · As of November 1, 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 17 retailers as of November 1, 2026, with prices from €143 to €826, a €683 spread on the same certified stone. MOH London lists it at €826. 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
Colour
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: Nov 5
Current: €826 EUR|Low: €135 EUR|High: €831 EUR|Avg: €380 EUR|+1.2%
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
Retailer 17
November 6, 2026
Retailer 4€143 EUR
Retailer 3€159 EUR
Retailer 13€165 EUR
Retailer 15€176 EUR
Retailer 16€176 EUR
Retailer 2€305 EUR
Retailer 11€308 EUR
Retailer 8€320 EUR
Retailer 14€339 EUR
Retailer 10€396 EUR
Retailer 12€415 EUR
Retailer 7€467 EUR
Retailer 9€508 EUR
Retailer 5€568 EUR
Retailer 17€600 EUR
Retailer 6€617 EUR
MOH London€826 EUR

46 data points across 17 retailers

17 retailers€143 EUR to €826 EUR

A
Cheapest Retailer
-
€143 EUR
A
Retailer 2
-
€159 EUR
View
Final sale: no returns
A
Retailer 3
-
€165 EUR
View
Retailer 4
-
€176 EUR
View
Price last confirmed 12 days ago
A
Retailer 5
-
€176 EUR
View
A
Retailer 6
-
€305 EUR
View
A
Retailer 7
-
€308 EUR
View
B+
Retailer 8
-
€320 EUR
View
A
Retailer 9
-
€339 EUR
View
B+
Retailer 10
-
€396 EUR
View
B+
Retailer 11
-
€415 EUR
View
B+
Retailer 12
-
€467 EUR
View
B+
Retailer 13
-
€508 EUR
View
B
Retailer 14
-
€568 EUR
View
B
Retailer 15
-
€600 EUR
View
B
Retailer 16
-
€617 EUR
View
Most Expensive
B
MOH London
LG729575214 · Nov 1
€826 EUR
£730 GBP
View
16 more retailers have this diamond
Prices start from €143 EURSave up to €683 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