CaratHunter
Plans
Round|Lab Grown|IGI

1.31ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG451055654

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055654

Diamond specifications and retailer prices

From €671 EUR
$750 USD
As of October 31, 2026
Save €2,287 EUR (77%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €2,958 EUR 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451055654 or 451055654. Listed at 11 retailers as of October 31, 2026, with prices from €671 to €2,958, a €2,287 spread on the same certified stone. MOH London lists it at €2,958. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055654
Dimensions7.11 × 7.14 × 4.32 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
undefined
Top View
7.11 mm7.14 mm1.31 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055654
Side View
Table 56.0%Crown 32.2°Girdle: THN-MEDPavilion 41.1°Culet: NoneDepth 60.8%

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: €2,958 EUR|Low: €653 EUR|High: €2,993 EUR|Avg: €1,309 EUR|-1.0%
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 2€671 EUR
Retailer 5€680 EUR
Retailer 9€761 EUR
Retailer 6€789 EUR
Retailer 10€789 EUR
Retailer 8€949 EUR
Retailer 11€1,238 EUR
Retailer 7€1,276 EUR
Retailer 4€1,876 EUR
Retailer 3€2,258 EUR
MOH London€2,958 EUR

16 data points across 11 retailers

11 retailers€671 EUR to €2,958 EUR

A
Cheapest Retailer
-
€671 EUR
$750 USD
A
Retailer 2
-
€680 EUR
$760 USD
View
A
Retailer 3
-
€740 EUR
$827 USD
View
B+
Retailer 4
-
€761 EUR
$850 USD
View
Final sale: no returns
B+
Retailer 5
-
€789 EUR
$881 USD
View
Retailer 6
-
€789 EUR
$881 USD
View
Price last confirmed 20 days ago
B+
Retailer 7
-
€949 EUR
$1,060 USD
View
B
Retailer 8
-
€1,276 EUR
$1,426 USD
View
B
Retailer 9
-
€1,876 EUR
$2,096 USD
View
B
Retailer 10
-
€2,218 EUR
$2,478 USD
View
Most Expensive
B
MOH London
LG451055654 · Nov 1
€2,958 EUR
£2,602 GBP
View
10 more retailers have this diamond
Prices start from €671 EURSave up to €2,287 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
€671 EUR