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Heart|Lab Grown|IGI

1.57ct D IF Heart Lab Grown Diamond

ID • D/IF • IGI LG618401799

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG618401799

Diamond specifications and retailer prices

From £642 GBP
$860 USD
As of October 30, 2026
Save £2,776 GBP (81%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £3,418 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.57ct lab-grown heart diamond

This 1.57ct 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 LG618401799 or 618401799. Listed at 22 retailers as of October 29, 2026, with prices from £642 to £3,418, a £2,776 spread on the same certified stone. Brilliant Earth lists it at £3,418. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.57
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.9°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG618401799
Dimensions7.38 × 8.05 × 4.60 mm
L/W Ratio1.09
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 mm8.05 mm1.57 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG618401799
Side View
Table 61.0%Crown 37.9°Girdle: MED-STKPavilion 39.1°Culet: NoneDepth 57.1%

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: £3,418 GBP|Low: £631 GBP|High: £3,426 GBP|Avg: £1,529 GBP|-0.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 31, 2026
Retailer 7£642 GBP
Retailer 3£699 GBP
Retailer 12£718 GBP
Retailer 15£745 GBP
Retailer 4£877 GBP
Retailer 17£918 GBP
Retailer 5£950 GBP
Retailer 10£1,066 GBP
Retailer 13£1,145 GBP
Retailer 16£1,345 GBP
Retailer 18£1,369 GBP
Retailer 2£1,561 GBP
Retailer 11£1,895 GBP
Retailer 19£2,093 GBP
Retailer 6£2,329 GBP
Retailer 9£2,582 GBP
Retailer 14£2,672 GBP
Retailer 8£2,794 GBP
Brilliant Earth£3,418 GBP

33 data points across 19 retailers

22 retailers£642 GBP to £3,418 GBP

A
Cheapest Retailer
-
£642 GBP
$860 USD
A
Retailer 2
-
£699 GBP
$936 USD
View
A
Retailer 3
-
£718 GBP
$962 USD
View
Final sale: no returns
A
Retailer 4
-
£745 GBP
$998 USD
View
Retailer 5
-
£762 GBP
$1,021 USD
View
Price last confirmed 14 days ago
B+
Retailer 6
-
£877 GBP
$1,175 USD
View
B+
Retailer 7
-
£918 GBP
$1,230 USD
View
B+
Retailer 8
-
£950 GBP
$1,273 USD
View
B+
Retailer 9
-
£1,066 GBP
$1,428 USD
View
B+
Retailer 10
-
£1,145 GBP
View
B+
Retailer 11
-
£1,345 GBP
€1,716 EUR
View
B+
Retailer 12
-
£1,369 GBP
ZAR 29,624 ZAR
View
B+
Retailer 13
-
£1,561 GBP
$2,091 USD
View
Retailer 14
-
£1,847 GBP
A$3,807 AUD
View
Price last confirmed 156 days ago
Retailer 15
-
£1,895 GBP
A$3,907 AUD
View
Price last confirmed 10 days ago
B
Retailer 16
-
£2,093 GBP
$2,805 USD
View
B
Retailer 17
-
£2,205 GBP
$2,954 USD
View
B
Retailer 18
-
£2,329 GBP
$3,121 USD
View
B
Retailer 19
-
£2,582 GBP
$3,460 USD
View
B
Retailer 20
-
£2,672 GBP
$3,580 USD
View
B
Retailer 21
-
£2,794 GBP
View
Most Expensive
B
Brilliant Earth
11243115A · Oct 29
£3,418 GBP
$4,580 USD
View
21 more retailers have this diamond
Prices start from £642 GBPSave up to £2,776 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
1.57ct Heart
£642 GBP