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Heart|Lab Grown|IGI

1.56ct D IF Heart Lab Grown Diamond

ID • D/IF • IGI LG618401846

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG618401846

Diamond specifications and retailer prices

From £638 GBP
$855 USD
As of October 30, 2026
Save £2,902 GBP (82%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £3,541 GBP at With Clarity · As of October 30, 2026
View at With Clarity

About this 1.56ct lab-grown heart diamond

This 1.56ct 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 LG618401846 or 618401846. Listed at 21 retailers as of October 30, 2026, with prices from £638 to £3,541, a £2,902 spread on the same certified stone. With Clarity lists it at £3,541. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.56
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG618401846
Dimensions7.38 × 7.95 × 4.75 mm
L/W Ratio1.08
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
Top View
7.38 mm7.95 mm1.56 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG618401846
Side View
Table 59.0%Crown 38.5°Girdle: MediumPavilion 40.8°Culet: NoneDepth 59.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £764 GBP|Low: £627 GBP|High: £3,541 GBP|Avg: £1,516 GBP|-2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
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Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
With Clarity
October 30, 2026
Retailer 5£638 GBP
Retailer 18£694 GBP
Retailer 12£740 GBP
Retailer 1£764 GBP
Retailer 2£869 GBP
Retailer 15£914 GBP
Retailer 3£940 GBP
Retailer 7£1,060 GBP
Retailer 11£1,137 GBP
Retailer 13£1,336 GBP
Retailer 16£1,360 GBP
Retailer 9£1,588 GBP
Retailer 8£1,884 GBP
Retailer 17£2,080 GBP
Retailer 4£2,315 GBP
Retailer 6£2,566 GBP
Retailer 14£2,789 GBP
Retailer 10£3,403 GBP
With Clarity£3,541 GBP

32 data points across 19 retailers

21 retailers£638 GBP to £3,541 GBP

A
Cheapest Retailer
-
£638 GBP
$855 USD
A
Retailer 2
-
£694 GBP
$930 USD
View
A
Retailer 3
-
£740 GBP
$991 USD
View
Retailer 4
-
£758 GBP
$1,015 USD
View
Price last confirmed 14 days ago
A
Retailer 5
-
£764 GBP
$1,024 USD
View
Final sale: no returns
A
Retailer 6
-
£869 GBP
$1,165 USD
View
B+
Retailer 7
-
£914 GBP
$1,224 USD
View
B+
Retailer 8
-
£940 GBP
$1,259 USD
View
B+
Retailer 9
-
£1,060 GBP
$1,420 USD
View
B+
Retailer 10
-
£1,137 GBP
View
B+
Retailer 11
-
£1,336 GBP
€1,705 EUR
View
B+
Retailer 12
-
£1,360 GBP
ZAR 29,441 ZAR
View
B+
Retailer 13
-
£1,588 GBP
$2,128 USD
View
Retailer 14
-
£1,884 GBP
A$3,883 AUD
View
Price last confirmed 10 days ago
B
Retailer 15
-
£2,080 GBP
$2,787 USD
View
B
Retailer 16
-
£2,191 GBP
$2,936 USD
View
B
Retailer 17
-
£2,315 GBP
$3,102 USD
View
B
Retailer 18
-
£2,566 GBP
$3,438 USD
View
B
Retailer 19
-
£2,789 GBP
View
B
Retailer 20
-
£3,403 GBP
$4,560 USD
View
Most Expensive
B
With Clarity
618401846 · Oct 30
£3,541 GBP
$4,744 USD
View
20 more retailers have this diamond
Prices start from £638 GBPSave up to £2,902 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
1.56ct Heart
£638 GBP