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Round|Lab Grown|IGI

1.31ct J SI1 Round Lab Grown Diamond

ID • J/SI1 • IGI LG436072947

Shape and cutting style on the report: Round brilliant

Certificate IGI LG436072947

Diamond specifications and retailer prices

From $621 USD
As of November 1, 2026
Save $2,414 USD (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,035 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.31ct lab-grown round diamond

This 1.31ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436072947 or 436072947. Listed at 12 retailers as of November 1, 2026, with prices from $621 to $3,035, a $2,414 spread on the same certified stone. MOH London lists it at $3,035. 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

1.31
Carat
J
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436072947
Dimensions7.13 × 7.10 × 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
7.13 mm7.10 mm1.31 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436072947
Side View
Table 59.5%Crown 34.3°GirdlePavilion 40.2°Culet: NoneDepth 59.4%

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 1
Current: $3,035 USD|Low: $497 USD|High: $3,072 USD|Avg: $1,157 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 6$621 USD
Retailer 9$696 USD
Retailer 2$750 USD
Retailer 7$770 USD
Retailer 10$770 USD
Retailer 11$779 USD
Retailer 5$900 USD
Retailer 8$1,179 USD
Retailer 3$1,215 USD
Retailer 4$1,912 USD
MOH London$3,035 USD

19 data points across 11 retailers

12 retailers$621 USD to $3,035 USD

A
Cheapest Retailer
-
$621 USD
B+
Retailer 2
-
$696 USD
View
Final sale: no returns
B+
Retailer 3
-
$696 USD
View
B+
Retailer 4
-
$750 USD
View
B+
Retailer 5
-
$770 USD
View
Retailer 6
-
$770 USD
View
Price last confirmed 16 days ago
B+
Retailer 7
-
$779 USD
View
B+
Retailer 8
-
$900 USD
View
B
Retailer 9
-
$1,179 USD
View
B
Retailer 10
-
$1,912 USD
View
B
Retailer 11
-
$2,026 USD
View
Most Expensive
B
MOH London
LG436072947 · Nov 1
$3,035 USD
£2,390 GBP
View
11 more retailers have this diamond
Prices start from $621 USDSave up to $2,414 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
1.31ct Round
$621 USD