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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 $152 USD
As of October 30, 2026
Save $890 USD (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,460 USD 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
Color
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

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: $1,460 USD|Low: $146 USD|High: $1,480 USD|Avg: $532 USD|-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$152 USD
Retailer 7$169 USD
Retailer 12$176 USD
Retailer 10$188 USD
Retailer 4$254 USD
Retailer 3$290 USD
Retailer 2$369 USD
Retailer 6$639 USD
Retailer 11$668 USD
Retailer 5$972 USD
Retailer 8$1,042 USD
Do Amore Diamonds$1,460 USD

43 data points across 12 retailers

13 retailers$152 USD to $1,042 USD

A
Cheapest Retailer
-
$152 USD
A
Retailer 2
-
$169 USD
View
Final sale: no returns
A
Retailer 3
-
$176 USD
View
A
Retailer 4
-
$188 USD
View
A
Retailer 5
-
$254 USD
View
B+
Retailer 6
-
$290 USD
View
B+
Retailer 7
-
$369 USD
£291 GBP
View
B
Retailer 8
-
$639 USD
View
B
Retailer 9
-
$668 USD
View
B
Retailer 10
-
$842 USD
View
B
Retailer 11
-
$972 USD
£765 GBP
View
B
Retailer 12
-
$1,042 USD
View
Most Expensive
Do Amore Diamonds
27-9600C54C1 · Nov 1
$1,460 USD
View
Price under review
12 more retailers have this diamond
Prices start from $152 USDSave up to $890 USD

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
$152 USD