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Heart|Lab Grown|IGI

1.31ct H SI1 Heart Lab Grown Diamond

ID • H/SI1 • IGI LG522254244

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG522254244

Diamond specifications and retailer prices

From £220 GBP
As of November 6, 2026
Save £898 GBP (80%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,118 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG522254244 or 522254244. Listed at 16 retailers as of November 6, 2026, with prices from £220 to £1,118, a £898 spread on the same certified stone. Reve Diamonds lists it at £1,118. 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
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.5°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG522254244
Dimensions7.92 × 7.08 × 4.21 mm
L/W Ratio1.12
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
7.92 mm7.08 mm1.31 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG522254244
Side View
Table 59.5%Crown 31.5°Girdle: STK-THKPavilion 41°Culet: NoneDepth 53.2%

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: £1,092 GBP|Low: £211 GBP|High: £1,541 GBP|Avg: £646 GBP|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Reve Diamonds
November 5, 2026
Retailer 11£220 GBP
Retailer 5£247 GBP
Retailer 15£256 GBP
Retailer 2£273 GBP
Retailer 12£273 GBP
Retailer 3£357 GBP
Retailer 9£388 GBP
Retailer 14£448 GBP
Retailer 4£461 GBP
Retailer 8£650 GBP
Retailer 10£840 GBP
Retailer 13£879 GBP
Retailer 6£914 GBP
Retailer 1£1,092 GBP
Reve Diamonds£1,118 GBP
Retailer 7£1,541 GBP

26 data points across 16 retailers

16 retailers£220 GBP to £1,118 GBP

A
Cheapest Retailer
-
£220 GBP
B+
Retailer 2
-
£247 GBP
View
Final sale: no returns
B+
Retailer 3
-
£256 GBP
View
B+
Retailer 4
-
£273 GBP
View
Retailer 5
-
£273 GBP
View
Price last confirmed 12 days ago
B+
Retailer 6
-
£357 GBP
View
B+
Retailer 7
-
£388 GBP
View
B+
Retailer 8
-
£448 GBP
View
B+
Retailer 9
-
£461 GBP
View
B+
Retailer 10
-
£468 GBP
View
B+
Retailer 11
-
£650 GBP
View
B+
Retailer 12
-
£840 GBP
View
B+
Retailer 13
-
£879 GBP
View
B+
Retailer 14
-
£914 GBP
View
B+
Retailer 15
-
£1,092 GBP
View
Most Expensive
B
Reve Diamonds
CAC247731 · Nov 6
£1,118 GBP
$1,497 USD
View
15 more retailers have this diamond
Prices start from £220 GBPSave up to £898 GBP

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
£220 GBP