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Round|Lab Grown|IGI

0.66ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG667451439

Shape and cutting style on the report: Round brilliant

Certificate IGI LG667451439

Diamond specifications and retailer prices

From €90 EUR
$101 USD
As of October 29, 2026
Save €729 EUR (89%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €820 EUR at MOH London · As of November 1, 2026
View at MOH London

About this 0.66ct lab-grown round diamond

This 0.66ct lab-grown round 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 LG667451439 or 667451439. Listed at 15 retailers as of October 29, 2026, with prices from €90 to €820, a €729 spread on the same certified stone. MOH London lists it at €820. 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
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG667451439
Dimensions5.63 × 5.60 × 3.45 mm
L/W Ratio1.01
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
5.63 mm5.60 mm0.66 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG667451439
Side View
Table 58.0%Crown 34.9°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.3%

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 29
Current: €820 EUR|Low: €71 EUR|High: €830 EUR|Avg: €254 EUR|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 8€90 EUR
Retailer 4€100 EUR
Retailer 10€119 EUR
Retailer 11€119 EUR
Retailer 7€143 EUR
Retailer 3€145 EUR
Retailer 6€214 EUR
Retailer 2€216 EUR
Retailer 5€223 EUR
Retailer 9€286 EUR
Retailer 12€324 EUR
MOH London€820 EUR

44 data points across 12 retailers

15 retailers€90 EUR to €820 EUR

A
Cheapest Retailer
-
€90 EUR
$101 USD
A
Retailer 2
-
€100 EUR
$112 USD
View
Final sale: no returns
A
Retailer 3
-
€105 EUR
$117 USD
View
A
Retailer 4
-
€119 EUR
$133 USD
View
Retailer 5
-
€119 EUR
$133 USD
View
Price last confirmed 16 days ago
A
Retailer 6
-
€143 EUR
$160 USD
View
B+
Retailer 7
-
€145 EUR
$162 USD
View
A
Retailer 8
-
€198 EUR
View
A
Retailer 9
-
€214 EUR
View
A
Retailer 10
-
€216 EUR
£190 GBP
View
B+
Retailer 11
-
€223 EUR
$249 USD
View
B+
Retailer 12
-
€286 EUR
$320 USD
View
B+
Retailer 13
-
€324 EUR
$362 USD
View
B+
Retailer 14
-
€359 EUR
$401 USD
View
Most Expensive
B
MOH London
LG667451439 · Nov 1
€820 EUR
£721 GBP
View
14 more retailers have this diamond
Prices start from €90 EURSave up to €729 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 Round
€90 EUR