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Heart|Lab Grown|IGI

1.50ct D FL Heart Lab Grown Diamond

EX • D/FL • IGI LG831604178

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG831604178

Diamond specifications and retailer prices

From £532 GBP
As of November 4, 2026
Save £2,535 GBP (83%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £3,067 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.5ct lab-grown heart diamond

This 1.5ct 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 top-tier cut grade and certified by IGI LG831604178 or 831604178. Listed at 21 retailers as of November 4, 2026, with prices from £532 to £3,067, a £2,535 spread on the same certified stone. Brilliant Earth lists it at £3,067. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.50
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831604178
Dimensions7.20 × 8.04 × 4.55 mm
L/W Ratio1.12
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
7.20 mm8.04 mm1.50 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831604178
Side View
Table 64.0%Crown 33.6°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 56.6%

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 4
Current: £3,067 GBP|Low: £532 GBP|High: £4,235 GBP|Avg: £1,485 GBP|-14.3%
Brilliant Earth
Retailer 2
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Retailer 21
November 5, 2026
Retailer 18£532 GBP
Retailer 19£579 GBP
Retailer 9£596 GBP
Retailer 4£616 GBP
Retailer 13£695 GBP
Retailer 12£720 GBP
Retailer 6£748 GBP
Retailer 7£793 GBP
Retailer 8£844 GBP
Retailer 21£895 GBP
Retailer 2£979 GBP
Retailer 16£1,133 GBP
Retailer 17£1,320 GBP
Retailer 5£1,733 GBP
Retailer 15£1,999 GBP
Retailer 10£2,076 GBP
Retailer 3£2,107 GBP
Retailer 14£2,125 GBP
Retailer 20£2,421 GBP
Retailer 11£2,932 GBP
Brilliant Earth£3,067 GBP

9 data points across 21 retailers

21 retailers£532 GBP to £3,067 GBP

A
Cheapest Retailer
-
£532 GBP
A
Retailer 2
-
£579 GBP
View
A
Retailer 3
-
£596 GBP
View
Final sale: no returns
A
Retailer 4
-
£616 GBP
View
A
Retailer 5
-
£695 GBP
View
A
Retailer 6
-
£720 GBP
View
A
Retailer 7
-
£748 GBP
View
A
Retailer 8
-
£793 GBP
View
A
Retailer 9
-
£844 GBP
View
B+
Retailer 10
-
£895 GBP
View
B+
Retailer 11
-
£979 GBP
View
B+
Retailer 12
-
£1,133 GBP
View
B+
Retailer 13
-
£1,320 GBP
View
B
Retailer 14
-
£1,733 GBP
View
B
Retailer 15
-
£1,999 GBP
View
B
Retailer 16
-
£2,076 GBP
View
B
Retailer 17
-
£2,107 GBP
View
B
Retailer 18
-
£2,125 GBP
View
B
Retailer 19
-
£2,421 GBP
View
B
Retailer 20
-
£2,932 GBP
View
Most Expensive
B
Brilliant Earth
22337458A · Nov 4
£3,067 GBP
$4,140 USD
View
20 more retailers have this diamond
Prices start from £532 GBPSave up to £2,535 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
1.50ct Heart
£532 GBP