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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 $489 USD
As of November 5, 2026
Save $2,034 USD (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,523 USD at MOH London · As of November 5, 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 November 5, 2026, with prices from $489 to $2,523, a $2,034 spread on the same certified stone. MOH London lists it at $2,523. 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: Nov 5
Current: $2,523 USD|Low: $391 USD|High: $2,560 USD|Avg: $945 USD|-0.3%
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
November 5, 2026
Retailer 10$489 USD
Retailer 3$547 USD
Retailer 14$547 USD
Retailer 5$564 USD
Retailer 11$606 USD
Retailer 13$606 USD
Retailer 7$620 USD
Retailer 2$650 USD
Retailer 9$745 USD
Retailer 12$944 USD
Retailer 6$1,035 USD
Retailer 4$1,594 USD
Retailer 8$1,629 USD
MOH London$2,523 USD

39 data points across 14 retailers

13 retailers$489 USD to $2,523 USD

A
Cheapest Retailer
-
$489 USD
A
Retailer 2
-
$547 USD
View
A
Retailer 3
-
$547 USD
View
Final sale: no returns
A
Retailer 4
-
$564 USD
View
Retailer 5
-
$606 USD
View
Price last confirmed 21 days ago
A
Retailer 6
-
$606 USD
View
A
Retailer 7
-
$620 USD
View
A
Retailer 8
-
$650 USD
View
A
Retailer 9
-
$745 USD
View
B+
Retailer 10
-
$944 USD
View
B
Retailer 11
-
$1,594 USD
View
B
Retailer 12
-
$1,629 USD
View
Most Expensive
B
MOH London
LG436073891 · Nov 5
$2,523 USD
£1,987 GBP
View
12 more retailers have this diamond
Prices start from $489 USDSave up to $2,034 USD

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
$489 USD