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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 €556 EUR
$621 USD
As of October 29, 2026
Save €2,176 EUR (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €2,732 EUR at MOH London · As of October 29, 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 October 29, 2026, with prices from €556 to €2,732, a €2,176 spread on the same certified stone. MOH London lists it at €2,732. 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: Oct 29
Current: €2,732 EUR|Low: €445 EUR|High: €2,750 EUR|Avg: €1,036 EUR|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 6€556 EUR
Retailer 9€623 EUR
Retailer 2€671 EUR
Retailer 7€689 EUR
Retailer 10€689 EUR
Retailer 11€697 EUR
Retailer 5€806 EUR
Retailer 8€1,055 EUR
Retailer 3€1,088 EUR
Retailer 4€1,711 EUR
MOH London€2,732 EUR

18 data points across 11 retailers

12 retailers€556 EUR to €2,732 EUR

A
Cheapest Retailer
-
€556 EUR
$621 USD
B+
Retailer 2
-
€623 EUR
$696 USD
View
Final sale: no returns
B+
Retailer 3
-
€623 EUR
$696 USD
View
B+
Retailer 4
-
€671 EUR
$750 USD
View
B+
Retailer 5
-
€689 EUR
$770 USD
View
Retailer 6
-
€689 EUR
$770 USD
View
Price last confirmed 15 days ago
B+
Retailer 7
-
€697 EUR
$779 USD
View
B+
Retailer 8
-
€806 EUR
$900 USD
View
B
Retailer 9
-
€1,055 EUR
$1,179 USD
View
B
Retailer 10
-
€1,711 EUR
$1,912 USD
View
B
Retailer 11
-
€1,813 EUR
$2,026 USD
View
Most Expensive
B
MOH London
LG436072947 · Oct 29
€2,732 EUR
£2,403 GBP
View
11 more retailers have this diamond
Prices start from €556 EURSave up to €2,176 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
1.31ct Round
€556 EUR