Heart|Lab Grown|IGI

1.55ct D IF Heart Lab Grown Diamond

ID • D/IF • IGI LG837615555

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG837615555

Diamond specifications and retailer prices

From £309 GBP
$414 USD
As of November 1, 2026
Save £1,811 GBP (85%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £2,120 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 LG837615555 or 837615555. Listed at 19 retailers as of October 31, 2026, with prices from £309 to £2,120, a £1,811 spread on the same certified stone. Brilliant Earth lists it at £2,120. 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 angle37.2°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837615555
Dimensions7.41 × 7.92 × 4.58 mm
L/W Ratio1.07
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
7.41 mm7.92 mm1.55 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837615555
Side View
Table 59.0%Crown 37.2°Girdle: MED-STKPavilion 38.3°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 1
Current: £2,120 GBP|Low: £278 GBP|High: £2,120 GBP|Avg: £650 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
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Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 6£278 GBP
Retailer 4£309 GBP
Retailer 11£316 GBP
Retailer 9£344 GBP
Retailer 10£349 GBP
Retailer 14£363 GBP
Retailer 3£373 GBP
Retailer 18£459 GBP
Retailer 16£463 GBP
Retailer 15£543 GBP
Retailer 2£592 GBP
Retailer 12£620 GBP
Retailer 19£797 GBP
Retailer 17£1,008 GBP
Retailer 5£1,089 GBP
Retailer 7£1,107 GBP
Retailer 8£1,200 GBP
Retailer 13£1,342 GBP
Brilliant Earth£2,120 GBP

23 data points across 19 retailers

19 retailers£309 GBP to £2,120 GBP

Retailer 1
-
£278 GBP
$372 USD
Price last confirmed 16 days ago
A
Retailer 2
-
£309 GBP
$414 USD
View
Final sale: no returns
Retailer 3
-
£316 GBP
$424 USD
View
Price last confirmed 18 days ago
Retailer 4
-
£344 GBP
$461 USD
View
Price last confirmed 16 days ago
Retailer 5
-
£349 GBP
$468 USD
View
Price last confirmed 17 days ago
A
Retailer 6
-
£363 GBP
View
A
Retailer 7
-
£373 GBP
HK$3,900 HKD
View
A
Retailer 8
-
£459 GBP
$615 USD
View
A
Retailer 9
-
£463 GBP
$620 USD
View
A
Retailer 10
-
£543 GBP
€693 EUR
View
A
Retailer 11
-
£592 GBP
ZAR 12,821 ZAR
View
A
Retailer 12
-
£620 GBP
View
A
Retailer 13
-
£797 GBP
A$1,643 AUD
View
B+
Retailer 14
-
£1,008 GBP
$1,350 USD
View
B+
Retailer 15
-
£1,089 GBP
SGD 1,972 SGD
View
Retailer 16
-
£1,107 GBP
$1,483 USD
View
Price last confirmed 16 days ago
B+
Retailer 17
-
£1,200 GBP
$1,608 USD
View
B+
Retailer 18
-
£1,342 GBP
View
Most Expensive
B
Brilliant Earth
21573871A · Oct 31
£2,120 GBP
$2,840 USD
View
18 more retailers have this diamond
Prices start from £309 GBPSave up to £1,811 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
£309 GBP