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Heart|Lab Grown|IGI

1.55ct D IF Heart Lab Grown Diamond

ID • D/IF • IGI LG818653714

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG818653714

Diamond specifications and retailer prices

From £228 GBP
$306 USD
As of October 30, 2026
Save £1,884 GBP (89%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £2,112 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.55ct lab-grown heart diamond

This 1.55ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818653714 or 818653714. Listed at 19 retailers as of October 30, 2026, with prices from £228 to £2,112, a £1,884 spread on the same certified stone. Brilliant Earth lists it at £2,112. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.9°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818653714
Dimensions7.02 × 7.81 × 4.73 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
7.02 mm7.81 mm1.55 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818653714
Side View
Table 60.0%Crown 36.9°Girdle: STK-VTKPavilion 39.3°Culet: NoneDepth 60.6%

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: Oct 30
Current: £2,112 GBP|Low: £228 GBP|High: £2,418 GBP|Avg: £745 GBP|-12.7%
Brilliant Earth
Retailer 2
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Retailer 11
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Retailer 13
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Retailer 19
November 2, 2026
Retailer 6£228 GBP
Retailer 4£256 GBP
Retailer 3£284 GBP
Retailer 10£284 GBP
Retailer 13£300 GBP
Retailer 16£399 GBP
Retailer 8£462 GBP
Retailer 12£489 GBP
Retailer 2£504 GBP
Retailer 15£661 GBP
Retailer 17£734 GBP
Retailer 5£790 GBP
Retailer 11£912 GBP
Retailer 19£932 GBP
Retailer 9£942 GBP
Retailer 7£947 GBP
Retailer 18£1,003 GBP
Retailer 14£1,142 GBP
Brilliant Earth£2,112 GBP

32 data points across 19 retailers

19 retailers£228 GBP to £2,112 GBP

A
Cheapest Retailer
-
£228 GBP
$306 USD
A
Retailer 2
-
£256 GBP
$343 USD
View
Final sale: no returns
A
Retailer 3
-
£284 GBP
$380 USD
View
Retailer 4
-
£284 GBP
$380 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
£300 GBP
View
A
Retailer 6
-
£399 GBP
$535 USD
View
A
Retailer 7
-
£462 GBP
$619 USD
View
A
Retailer 8
-
£489 GBP
ZAR 10,585 ZAR
View
A
Retailer 9
-
£504 GBP
View
A
Retailer 10
-
£661 GBP
A$1,363 AUD
View
A
Retailer 11
-
£734 GBP
$984 USD
View
A
Retailer 12
-
£790 GBP
$1,059 USD
View
B+
Retailer 13
-
£912 GBP
$1,222 USD
View
B+
Retailer 14
-
£932 GBP
$1,249 USD
View
B+
Retailer 15
-
£942 GBP
SGD 1,705 SGD
View
B+
Retailer 16
-
£947 GBP
$1,268 USD
View
B+
Retailer 17
-
£1,003 GBP
$1,344 USD
View
B+
Retailer 18
-
£1,142 GBP
View
Most Expensive
B
Brilliant Earth
21603033A · Oct 31
£2,112 GBP
$2,830 USD
View
18 more retailers have this diamond
Prices start from £228 GBPSave up to £1,884 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
1.55ct Heart
£228 GBP