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Round|Lab Grown|IGI

1.20ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG440010926

Shape and cutting style on the report: Round brilliant

Certificate IGI LG440010926

Diamond specifications and retailer prices

From €474 EUR
$530 USD
As of October 31, 2026
Save €4,097 EUR (90%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €4,571 EUR at MOH London · As of October 27, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG440010926 or 440010926. Listed at 12 retailers as of October 27, 2026, with prices from €474 to €4,571, a €4,097 spread on the same certified stone. MOH London lists it at €4,571. 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
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440010926
Dimensions6.80 × 6.82 × 4.22 mm
L/W Ratio1.00
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
6.80 mm6.82 mm1.20 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG440010926
Side View
Table 56.0%Crown 33.4°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.0%

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 31
Current: €4,571 EUR|Low: €474 EUR|High: €4,625 EUR|Avg: €1,970 EUR|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 6€474 EUR
Retailer 5€1,224 EUR
Retailer 10€1,371 EUR
Retailer 7€1,421 EUR
Retailer 9€1,421 EUR
Retailer 4€1,575 EUR
Retailer 11€1,933 EUR
Retailer 8€2,245 EUR
Retailer 2€2,427 EUR
Retailer 3€2,648 EUR
MOH London€4,571 EUR

17 data points across 11 retailers

12 retailers€474 EUR to €4,571 EUR

A
Cheapest Retailer
-
€474 EUR
$530 USD
B+
Retailer 2
-
€1,224 EUR
$1,368 USD
View
B+
Retailer 3
-
€1,333 EUR
$1,489 USD
View
B+
Retailer 4
-
€1,371 EUR
$1,532 USD
View
Final sale: no returns
Retailer 5
-
€1,421 EUR
$1,587 USD
View
Price last confirmed 19 days ago
B+
Retailer 6
-
€1,421 EUR
$1,587 USD
View
B+
Retailer 7
-
€1,575 EUR
$1,760 USD
View
B
Retailer 8
-
€2,245 EUR
$2,508 USD
View
B
Retailer 9
-
€2,427 EUR
View
B
Retailer 10
-
€2,648 EUR
$2,958 USD
View
B
Retailer 11
-
€2,663 EUR
$2,975 USD
View
Most Expensive
B
MOH London
LG440010926 · Oct 27
€4,571 EUR
£4,021 GBP
View
11 more retailers have this diamond
Prices start from €474 EURSave up to €4,097 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
€474 EUR