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Heart|Lab Grown|IGI

1.31ct F VS1 Heart Lab Grown Diamond

EX • F/VS1 • IGI LG728512322

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG728512322

Diamond specifications and retailer prices

From $426 USD
As of November 6, 2026
Save $417 USD (49%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,154 USD at MOH London · As of October 21, 2026
View at MOH London

About this 1.31ct lab-grown heart diamond

This 1.31ct lab-grown heart sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG728512322 or 728512322. Listed at 5 retailers as of November 6, 2026, with a 98% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.31
Carat
F
Color
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG728512322
Dimensions6.28 × 7.46 × 4.56 mm
L/W Ratio1.19
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.28 mm7.46 mm1.31 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG728512322
Side View
Table 57.0%Crown 36.3°Girdle: STK-VTKPavilion 39.9°Culet: NoneDepth 61.1%

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 6
Current: $1,154 USD|Low: $417 USD|High: $1,209 USD|Avg: $651 USD|-3.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 5, 2026
Retailer 6$426 USD
Retailer 2$445 USD
Retailer 4$495 USD
Retailer 3$501 USD
Retailer 5$843 USD
MOH London$1,154 USD

33 data points across 6 retailers

5 retailers$426 USD to $843 USD

A
Cheapest Retailer
-
$426 USD
A
Retailer 2
-
$445 USD
View
B+
Retailer 3
-
$501 USD
View
B
Retailer 4
-
$843 USD
View
Most Expensive
MOH London
LG728512322 · Oct 21
$1,154 USD
£909 GBP
View
Price last confirmed 16 days ago
4 more retailers have this diamond
Prices start from $426 USDSave up to $417 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 Heart
$426 USD