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Round|Lab Grown|IGI

1.20ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG617427829

Shape and cutting style on the report: Round brilliant

Certificate IGI LG617427829

Diamond specifications and retailer prices

From €254 EUR
$284 USD
As of October 30, 2026
Save €677 EUR (73%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €931 EUR at MOH London · As of October 29, 2026
View at MOH London

About this 1.2ct lab-grown round diamond

This 1.2ct 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 LG617427829 or 617427829. Listed at 6 retailers as of October 29, 2026, with prices from €254 to €931, a €677 spread on the same certified stone. MOH London lists it at €931. 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

1.20
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG617427829
Dimensions6.82 × 6.76 × 4.16 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.82 mm6.76 mm1.20 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG617427829
Side View
Table 58.0%Crown 35.7°Girdle: ThickPavilion 40.1°Culet: NoneDepth 61.3%

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: €931 EUR|Low: €254 EUR|High: €937 EUR|Avg: €434 EUR|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 6€254 EUR
Retailer 4€324 EUR
Retailer 2€355 EUR
Retailer 3€385 EUR
Retailer 5€403 EUR
MOH London€931 EUR

41 data points across 6 retailers

6 retailers€254 EUR to €931 EUR

A
Cheapest Retailer
-
€254 EUR
$284 USD
A
Retailer 2
-
€324 EUR
$362 USD
View
B+
Retailer 3
-
€355 EUR
£312 GBP
View
Retailer 4
-
€385 EUR
$430 USD
View
Price last confirmed 10 days ago
B+
Retailer 5
-
€403 EUR
$450 USD
View
Most Expensive
B
MOH London
LG617427829 · Oct 29
€931 EUR
£819 GBP
View
5 more retailers have this diamond
Prices start from €254 EURSave up to €677 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
1.20ct Round
€254 EUR