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Heart|Lab Grown|IGI

1.51ct H VS1 Heart Lab Grown Diamond

EX • H/VS1 • IGI LG782601931

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG782601931

Diamond specifications and retailer prices

From £163 GBP
As of November 4, 2026
Save £645 GBP (80%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,278 GBP at Brilliant Earth · As of September 28, 2026
View at Brilliant Earth

About this 1.51ct lab-grown heart diamond

This 1.51ct lab-grown heart sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG782601931 or 782601931. Listed at 19 retailers as of November 4, 2026, with a 395% 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

1.51
Carat
H
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.2°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG782601931
Dimensions7.23 × 8.00 × 4.62 mm
L/W Ratio1.11
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 Faint Blue
Top View
7.23 mm8.00 mm1.51 ctH / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG782601931
Side View
Table 60.0%Crown 36.2°Girdle: MED-STKPavilion 38.7°Culet: NoneDepth 57.8%

Caratlytics Score

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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 4
Current: £758 GBP|Low: £163 GBP|High: £1,241 GBP|Avg: £440 GBP|-38.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
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Retailer 6
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Retailer 11
Retailer 12
Retailer 13
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Retailer 18
November 5, 2026
Retailer 14£163 GBP
Retailer 7£182 GBP
Retailer 15£189 GBP
Retailer 17£202 GBP
Retailer 10£215 GBP
Retailer 2£268 GBP
Retailer 4£335 GBP
Retailer 9£346 GBP
Retailer 16£348 GBP
Retailer 5£369 GBP
Retailer 3£391 GBP
Retailer 13£472 GBP
Retailer 12£531 GBP
Retailer 18£650 GBP
Retailer 8£656 GBP
Retailer 6£689 GBP
Brilliant Earth£758 GBP
Retailer 11£808 GBP

45 data points across 18 retailers

19 retailers£163 GBP to £808 GBP

A
Cheapest Retailer
-
£163 GBP
A
Retailer 2
-
£182 GBP
View
Final sale: no returns
A
Retailer 3
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£189 GBP
View
A
Retailer 4
-
£202 GBP
View
Retailer 5
-
£215 GBP
View
Price last confirmed 11 days ago
A
Retailer 6
-
£268 GBP
View
A
Retailer 7
-
£335 GBP
View
A
Retailer 8
-
£346 GBP
View
A
Retailer 9
-
£348 GBP
View
A
Retailer 10
-
£369 GBP
View
A
Retailer 11
-
£391 GBP
View
A
Retailer 12
-
£472 GBP
View
B+
Retailer 13
-
£531 GBP
View
B+
Retailer 14
-
£650 GBP
View
B+
Retailer 15
-
£656 GBP
View
B+
Retailer 16
-
£689 GBP
View
B+
Retailer 17
-
£758 GBP
View
B
Retailer 18
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£808 GBP
View
Most Expensive
Brilliant Earth
20465160A · Sep 28
£1,278 GBP
$1,720 USD
View
Price last confirmed 38 days ago
18 more retailers have this diamond
Prices start from £163 GBPSave up to £645 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
1.51ct Heart
£163 GBP