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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 €136 EUR
$152 USD
As of November 2, 2026
Save €794 EUR (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €1,302 EUR 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 November 1, 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: Nov 2
Current: €1,302 EUR|Low: €130 EUR|High: €1,320 EUR|Avg: €475 EUR|-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€136 EUR
Retailer 7€151 EUR
Retailer 12€157 EUR
Retailer 10€168 EUR
Retailer 4€226 EUR
Retailer 3€259 EUR
Retailer 2€329 EUR
Retailer 6€570 EUR
Retailer 11€596 EUR
Retailer 5€866 EUR
Retailer 8€929 EUR
Do Amore Diamonds€1,302 EUR

43 data points across 12 retailers

13 retailers€136 EUR to €929 EUR

A
Cheapest Retailer
-
€136 EUR
$152 USD
A
Retailer 2
-
€151 EUR
$169 USD
View
Final sale: no returns
A
Retailer 3
-
€157 EUR
$176 USD
View
A
Retailer 4
-
€168 EUR
$188 USD
View
A
Retailer 5
-
€226 EUR
$254 USD
View
B+
Retailer 6
-
€259 EUR
$290 USD
View
B+
Retailer 7
-
€329 EUR
£291 GBP
View
B
Retailer 8
-
€570 EUR
$639 USD
View
B
Retailer 9
-
€596 EUR
$668 USD
View
B
Retailer 10
-
€750 EUR
$842 USD
View
B
Retailer 11
-
€866 EUR
£765 GBP
View
B
Retailer 12
-
€929 EUR
$1,042 USD
View
Most Expensive
Do Amore Diamonds
27-9600C54C1 · Nov 1
€1,302 EUR
$1,460 USD
View
Price under review
12 more retailers have this diamond
Prices start from €136 EURSave up to €794 EUR

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
€136 EUR