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Heart|Lab Grown|IGI

1.66ct H VS1 Heart Lab Grown Diamond

EX • H/VS1 • IGI LG665402361

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG665402361

Diamond specifications and retailer prices

From £223 GBP
$299 USD
As of November 1, 2026
Save £1,499 GBP (87%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,721 GBP at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 1.66ct lab-grown heart diamond

This 1.66ct lab-grown heart sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG665402361 or 665402361. Listed at 11 retailers as of November 1, 2026, with prices from £223 to £1,721, a £1,499 spread on the same certified stone. Do Amore Diamonds lists it at £1,721. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.66
Carat
H
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.9°
Pavilion angle39°
OriginLab Grown
Grading LabIGI
CertificateIGI LG665402361
Dimensions7.48 × 8.22 × 4.55 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.48 mm8.22 mm1.66 ctH / VS1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG665402361
Side View
Table 62.0%Crown 35.9°Girdle: MED-STKPavilion 39°Culet: NoneDepth 55.4%

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: Nov 1
Current: £1,721 GBP|Low: £223 GBP|High: £1,721 GBP|Avg: £668 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 7£223 GBP
Retailer 2£328 GBP
Retailer 10£341 GBP
Retailer 8£376 GBP
Retailer 9£414 GBP
Retailer 4£424 GBP
Retailer 3£672 GBP
Retailer 6£718 GBP
Retailer 11£916 GBP
Retailer 5£985 GBP
Do Amore Diamonds£1,721 GBP

23 data points across 11 retailers

11 retailers£223 GBP to £1,721 GBP

A
Cheapest Retailer
-
£223 GBP
$299 USD
A
Retailer 2
-
£328 GBP
View
A
Retailer 3
-
£341 GBP
$457 USD
View
A
Retailer 4
-
£376 GBP
$504 USD
View
A
Retailer 5
-
£414 GBP
$556 USD
View
A
Retailer 6
-
£424 GBP
ZAR 9,190 ZAR
View
B+
Retailer 7
-
£718 GBP
$964 USD
View
B
Retailer 8
-
£791 GBP
$1,061 USD
View
B
Retailer 9
-
£916 GBP
$1,229 USD
View
B
Retailer 10
-
£985 GBP
View
Most Expensive
B
Do Amore Diamonds
27-CF087E7DD · Nov 2
£1,721 GBP
$2,310 USD
View
10 more retailers have this diamond
Prices start from £223 GBPSave up to £1,499 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
1.66ct Heart
£223 GBP