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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 £75 GBP
$101 USD
As of November 1, 2026
Save £608 GBP (89%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £683 GBP 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 November 1, 2026, with prices from £75 to £683, a £608 spread on the same certified stone. MOH London lists it at £683. 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
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

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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 1
Current: £683 GBP|Low: £59 GBP|High: £692 GBP|Avg: £212 GBP|-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£75 GBP
Retailer 4£84 GBP
Retailer 10£99 GBP
Retailer 11£99 GBP
Retailer 7£119 GBP
Retailer 3£121 GBP
Retailer 6£179 GBP
Retailer 2£180 GBP
Retailer 5£186 GBP
Retailer 9£239 GBP
Retailer 12£270 GBP
MOH London£683 GBP

44 data points across 12 retailers

15 retailers£75 GBP to £683 GBP

A
Cheapest Retailer
-
£75 GBP
$101 USD
A
Retailer 2
-
£84 GBP
$112 USD
View
Final sale: no returns
A
Retailer 3
-
£87 GBP
$117 USD
View
A
Retailer 4
-
£99 GBP
$133 USD
View
Retailer 5
-
£99 GBP
$133 USD
View
Price last confirmed 16 days ago
Retailer 6
-
£119 GBP
$160 USD
View
Price last confirmed 7 days ago
B+
Retailer 7
-
£121 GBP
$162 USD
View
A
Retailer 8
-
£165 GBP
€211 EUR
View
A
Retailer 9
-
£179 GBP
€228 EUR
View
A
Retailer 10
-
£180 GBP
View
B+
Retailer 11
-
£186 GBP
$249 USD
View
B+
Retailer 12
-
£239 GBP
$320 USD
View
B+
Retailer 13
-
£270 GBP
$362 USD
View
B+
Retailer 14
-
£299 GBP
$401 USD
View
Most Expensive
B
MOH London
LG667451439 · Nov 1
£683 GBP
View
14 more retailers have this diamond
Prices start from £75 GBPSave up to £608 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 Round
£75 GBP