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Heart|Lab Grown|IGI

1.71ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG818683416

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG818683416

Diamond specifications and retailer prices

From £475 GBP
$636 USD
As of October 30, 2026
Save £3,735 GBP (89%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,209 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

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 LG818683416 or 818683416. Listed at 14 retailers as of October 30, 2026, with prices from £475 to £4,209, a £3,735 spread on the same certified stone. Do Amore Diamonds lists it at £4,209. 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 angle35°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818683416
Dimensions8.00 × 7.47 × 4.88 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
8.00 mm7.47 mm1.71 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818683416
Side View
Table 57.0%Crown 35°Girdle: STK-THKPavilion 41.3°Culet: NoneDepth 61.0%

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: £4,209 GBP|Low: £475 GBP|High: £6,068 GBP|Avg: £1,868 GBP|-30.6%
Do Amore Diamonds
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
October 30, 2026
Retailer 10£475 GBP
Retailer 3£516 GBP
Retailer 13£672 GBP
Retailer 5£702 GBP
Retailer 6£814 GBP
Retailer 12£900 GBP
Retailer 8£1,027 GBP
Retailer 4£1,081 GBP
Retailer 14£1,405 GBP
Retailer 15£1,708 GBP
Retailer 9£2,398 GBP
Retailer 11£2,515 GBP
Retailer 2£3,000 GBP
Retailer 7£3,567 GBP
Do Amore Diamonds£4,209 GBP

23 data points across 15 retailers

14 retailers£475 GBP to £4,209 GBP

A
Cheapest Retailer
-
£475 GBP
$636 USD
A
Retailer 2
-
£516 GBP
$692 USD
View
A
Retailer 3
-
£672 GBP
$900 USD
View
A
Retailer 4
-
£702 GBP
$940 USD
View
A
Retailer 5
-
£814 GBP
$1,091 USD
View
A
Retailer 6
-
£900 GBP
$1,206 USD
View
B+
Retailer 7
-
£1,027 GBP
€1,310 EUR
View
Retailer 8
-
£1,081 GBP
$1,449 USD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
£1,405 GBP
$1,883 USD
View
B
Retailer 10
-
£1,708 GBP
$2,288 USD
View
B+
Retailer 11
-
£2,398 GBP
View
B
Retailer 12
-
£2,515 GBP
$3,370 USD
View
B
Retailer 13
-
£3,000 GBP
$4,020 USD
View
Most Expensive
B
Do Amore Diamonds
27-080828369 · Oct 31
£4,209 GBP
$5,640 USD
View
13 more retailers have this diamond
Prices start from £475 GBPSave up to £3,735 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
£475 GBP