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Round|Lab Grown|IGI

1.09ct J SI1 Round Lab Grown Diamond

ID • J/SI1 • IGI LG436073891

Shape and cutting style on the report: Round brilliant

Certificate IGI LG436073891

Diamond specifications and retailer prices

From €438 EUR
$489 USD
As of October 29, 2026
Save €1,839 EUR (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €2,277 EUR at MOH London · As of October 29, 2026
View at MOH London

About this 1.09ct lab-grown round diamond

This 1.09ct lab-grown round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436073891 or 436073891. Listed at 13 retailers as of October 29, 2026, with prices from €438 to €2,277, a €1,839 spread on the same certified stone. MOH London lists it at €2,277. 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

1.09
Carat
J
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436073891
Dimensions6.67 × 6.64 × 4.04 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
6.67 mm6.64 mm1.09 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436073891
Side View
Table 56.5%Crown 33°GirdlePavilion 40.5°Culet: NoneDepth 60.7%

Caratlytics Score

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

Price History

Last verified: Oct 29
Current: €2,277 EUR|Low: €350 EUR|High: €2,292 EUR|Avg: €836 EUR|+0.6%
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
October 30, 2026
Retailer 10€438 EUR
Retailer 3€490 EUR
Retailer 14€490 EUR
Retailer 5€505 EUR
Retailer 11€542 EUR
Retailer 13€542 EUR
Retailer 2€555 EUR
Retailer 7€587 EUR
Retailer 9€667 EUR
Retailer 12€845 EUR
Retailer 6€926 EUR
Retailer 4€1,427 EUR
Retailer 8€1,458 EUR
MOH London€2,277 EUR

39 data points across 14 retailers

13 retailers€438 EUR to €2,277 EUR

A
Cheapest Retailer
-
€438 EUR
$489 USD
A
Retailer 2
-
€490 EUR
$547 USD
View
A
Retailer 3
-
€490 EUR
$547 USD
View
Final sale: no returns
A
Retailer 4
-
€505 EUR
$564 USD
View
Retailer 5
-
€542 EUR
$606 USD
View
Price last confirmed 15 days ago
A
Retailer 6
-
€542 EUR
$606 USD
View
A
Retailer 7
-
€555 EUR
$620 USD
View
A
Retailer 8
-
€587 EUR
£517 GBP
View
A
Retailer 9
-
€667 EUR
$745 USD
View
B+
Retailer 10
-
€845 EUR
$944 USD
View
B
Retailer 11
-
€1,427 EUR
$1,594 USD
View
B
Retailer 12
-
€1,458 EUR
$1,629 USD
View
Most Expensive
B
MOH London
LG436073891 · Oct 29
€2,277 EUR
£2,003 GBP
View
12 more retailers have this diamond
Prices start from €438 EURSave up to €1,839 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
1.09ct Round
€438 EUR