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Heart|Lab Grown|IGI

0.66ct E SI1 Heart Lab Grown Diamond

ID • E/SI1 • IGI LG670409091

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG670409091

Diamond specifications and retailer prices

From £113 GBP
$152 USD
As of October 30, 2026
Save £665 GBP (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,090 GBP at Do Amore Diamonds · As of November 1, 2026
View at Do Amore Diamonds

About this 0.66ct lab-grown heart diamond

This 0.66ct lab-grown heart sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG670409091 or 670409091. Listed at 13 retailers as of October 30, 2026, with a 586% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.66
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle37.2°
Pavilion angle42.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG670409091
Dimensions5.32 × 5.77 × 3.49 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
5.32 mm5.77 mm0.66 ctE / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG670409091
Side View
Table 64.0%Crown 37.2°Girdle: MED-THKPavilion 42.3°Culet: NoneDepth 60.5%

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: £1,090 GBP|Low: £109 GBP|High: £1,105 GBP|Avg: £397 GBP|-1.4%
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
November 2, 2026
Retailer 9£113 GBP
Retailer 7£126 GBP
Retailer 12£131 GBP
Retailer 10£140 GBP
Retailer 4£190 GBP
Retailer 3£216 GBP
Retailer 2£276 GBP
Retailer 6£477 GBP
Retailer 11£499 GBP
Retailer 5£725 GBP
Retailer 8£778 GBP
Do Amore Diamonds£1,090 GBP

43 data points across 12 retailers

13 retailers£113 GBP to £778 GBP

A
Cheapest Retailer
-
£113 GBP
$152 USD
A
Retailer 2
-
£126 GBP
$169 USD
View
Final sale: no returns
A
Retailer 3
-
£131 GBP
$176 USD
View
A
Retailer 4
-
£140 GBP
$188 USD
View
A
Retailer 5
-
£190 GBP
$254 USD
View
B+
Retailer 6
-
£216 GBP
$290 USD
View
B+
Retailer 7
-
£276 GBP
View
B
Retailer 8
-
£477 GBP
$639 USD
View
B
Retailer 9
-
£499 GBP
$668 USD
View
B
Retailer 10
-
£628 GBP
$842 USD
View
B
Retailer 11
-
£725 GBP
View
B
Retailer 12
-
£778 GBP
$1,042 USD
View
Most Expensive
Do Amore Diamonds
27-9600C54C1 · Nov 1
£1,090 GBP
$1,460 USD
View
Price under review
12 more retailers have this diamond
Prices start from £113 GBPSave up to £665 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
0.66ct Heart
£113 GBP