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Heart|Lab Grown|IGI

1.51ct D FL Heart Lab Grown Diamond

VG • D/FL • IGI LG825655952

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG825655952

Diamond specifications and retailer prices

From £540 GBP
As of November 4, 2026
Save £2,119 GBP (80%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £2,659 GBP at Brilliant Earth · As of November 4, 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 D colour (colourless) and FL clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG825655952 or 825655952. Listed at 21 retailers as of November 4, 2026, with prices from £540 to £2,659, a £2,119 spread on the same certified stone. Brilliant Earth lists it at £2,659. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38°
Pavilion angle37.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825655952
Dimensions7.19 × 7.95 × 4.53 mm
L/W Ratio1.11
Girdle conditionFaceted
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
7.19 mm7.95 mm1.51 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825655952
Side View
Table 61.0%Crown 38°Girdle: MED-STKPavilion 37.4°Culet: NoneDepth 57.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £2,659 GBP|Low: £540 GBP|High: £3,593 GBP|Avg: £1,507 GBP|-26.0%
Brilliant Earth
Retailer 2
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Retailer 12
Retailer 13
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Retailer 17
November 5, 2026
Retailer 5£540 GBP
Retailer 10£631 GBP
Retailer 9£656 GBP
Retailer 11£693 GBP
Retailer 7£796 GBP
Retailer 17£836 GBP
Retailer 6£843 GBP
Retailer 2£885 GBP
Retailer 12£909 GBP
Retailer 13£1,028 GBP
Retailer 15£1,288 GBP
Retailer 4£1,417 GBP
Retailer 3£1,807 GBP
Retailer 8£1,931 GBP
Retailer 16£1,951 GBP
Retailer 14£2,358 GBP
Brilliant Earth£2,659 GBP

31 data points across 17 retailers

21 retailers£540 GBP to £2,659 GBP

A
Cheapest Retailer
-
£540 GBP
Final sale: no returns
A
Retailer 2
-
£631 GBP
View
Retailer 3
-
£656 GBP
View
Price last confirmed 28 days ago
A
Retailer 4
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£693 GBP
View
Retailer 5
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£716 GBP
View
Price last confirmed 37 days ago
Retailer 6
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£761 GBP
View
Price last confirmed 33 days ago
Retailer 7
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£761 GBP
View
Price last confirmed 24 days ago
A
Retailer 8
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£796 GBP
View
B+
Retailer 9
-
£836 GBP
View
B+
Retailer 10
-
£843 GBP
View
B+
Retailer 11
-
£885 GBP
View
B+
Retailer 12
-
£909 GBP
View
B+
Retailer 13
-
£1,028 GBP
View
B+
Retailer 14
-
£1,288 GBP
View
B+
Retailer 15
-
£1,417 GBP
View
B
Retailer 16
-
£1,807 GBP
View
B
Retailer 17
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£1,931 GBP
View
B
Retailer 18
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£1,951 GBP
View
Retailer 19
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£2,141 GBP
View
Price last confirmed 31 days ago
B
Retailer 20
-
£2,358 GBP
View
Most Expensive
B
Brilliant Earth
21584228A · Nov 4
£2,659 GBP
$3,590 USD
View
20 more retailers have this diamond
Prices start from £540 GBPSave up to £2,119 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
£540 GBP