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Heart|Lab Grown|IGI

1.71ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG749573318

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG749573318

Diamond specifications and retailer prices

From £541 GBP
$725 USD
As of October 30, 2026
Save £2,489 GBP (82%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £3,030 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.71ct lab-grown heart diamond

This 1.71ct 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 LG749573318 or 749573318. Listed at 20 retailers as of October 30, 2026, with prices from £541 to £3,030, a £2,489 spread on the same certified stone. Brilliant Earth lists it at £3,030. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.71
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle37°
OriginLab Grown
Grading LabIGI
CertificateIGI LG749573318
Dimensions7.50 × 8.43 × 4.66 mm
L/W Ratio1.12
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
7.50 mm8.43 mm1.71 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG749573318
Side View
Table 57.0%Crown 33.6°Girdle: MED-THKPavilion 37°Culet: NoneDepth 55.3%

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: Oct 30
Current: £3,030 GBP|Low: £541 GBP|High: £4,090 GBP|Avg: £1,517 GBP|-25.9%
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£541 GBP
Retailer 5£589 GBP
Retailer 2£605 GBP
Retailer 17£628 GBP
Retailer 10£642 GBP
Retailer 18£761 GBP
Retailer 6£812 GBP
Retailer 12£1,007 GBP
Retailer 15£1,018 GBP
Retailer 4£1,049 GBP
Retailer 14£1,154 GBP
Retailer 8£1,409 GBP
Retailer 19£1,764 GBP
Retailer 13£2,073 GBP
Retailer 16£2,163 GBP
Retailer 3£2,467 GBP
Retailer 9£2,500 GBP
Retailer 11£2,670 GBP
Brilliant Earth£3,030 GBP

28 data points across 19 retailers

20 retailers£541 GBP to £3,030 GBP

A
Cheapest Retailer
-
£541 GBP
$725 USD
A
Retailer 2
-
£589 GBP
$789 USD
View
A
Retailer 3
-
£605 GBP
$811 USD
View
Final sale: no returns
A
Retailer 4
-
£628 GBP
$841 USD
View
Retailer 5
-
£642 GBP
$860 USD
View
Price last confirmed 14 days ago
A
Retailer 6
-
£761 GBP
$1,020 USD
View
A
Retailer 7
-
£812 GBP
$1,088 USD
View
A
Retailer 8
-
£1,007 GBP
View
B+
Retailer 9
-
£1,018 GBP
$1,364 USD
View
B+
Retailer 10
-
£1,049 GBP
$1,406 USD
View
B+
Retailer 11
-
£1,154 GBP
ZAR 24,969 ZAR
View
B+
Retailer 12
-
£1,409 GBP
$1,888 USD
View
B+
Retailer 13
-
£1,764 GBP
$2,364 USD
View
B
Retailer 14
-
£2,073 GBP
$2,778 USD
View
B+
Retailer 15
-
£2,140 GBP
$2,868 USD
View
B+
Retailer 16
-
£2,163 GBP
$2,899 USD
View
B
Retailer 17
-
£2,467 GBP
View
B
Retailer 18
-
£2,500 GBP
SGD 4,527 SGD
View
B
Retailer 19
-
£2,670 GBP
$3,578 USD
View
Most Expensive
B
Brilliant Earth
21417283A · Oct 30
£3,030 GBP
$4,060 USD
View
19 more retailers have this diamond
Prices start from £541 GBPSave up to £2,489 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
1.71ct Heart
£541 GBP