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Round|Lab Grown|IGI

1.31ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG459132430

Shape and cutting style on the report: Round brilliant

Certificate IGI LG459132430

Diamond specifications and retailer prices

From €253 EUR
$284 USD
As of October 25, 2026
Save €868 EUR (77%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: €1,121 EUR at MOH London · As of October 26, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG459132430 or 459132430. Listed at 7 retailers as of October 25, 2026, with prices from €253 to €1,121, a €868 spread on the same certified stone. MOH London lists it at €1,121. 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
F
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459132430
Dimensions7.00 × 6.96 × 4.30 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.00 mm6.96 mm1.31 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG459132430
Side View
Table 58.0%Crown 35.7°Girdle: ThickPavilion 40.3°Culet: NoneDepth 61.7%

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 25
Current: €1,121 EUR|Low: €253 EUR|High: €1,133 EUR|Avg: €517 EUR|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 31, 2026
Retailer 4€253 EUR
Retailer 7€307 EUR
Retailer 5€430 EUR
Retailer 3€473 EUR
Retailer 2€531 EUR
Retailer 6€538 EUR
MOH London€1,121 EUR

36 data points across 7 retailers

7 retailers€253 EUR to €1,121 EUR

A
Cheapest Retailer
-
€253 EUR
$284 USD
A
Retailer 2
-
€307 EUR
$344 USD
View
B+
Retailer 3
-
€430 EUR
$482 USD
View
B+
Retailer 4
-
€473 EUR
$530 USD
View
B+
Retailer 5
-
€531 EUR
£469 GBP
View
B+
Retailer 6
-
€538 EUR
$603 USD
View
Most Expensive
B
MOH London
LG459132430 · Oct 26
€1,121 EUR
£990 GBP
View
6 more retailers have this diamond
Prices start from €253 EURSave up to €868 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
€253 EUR