CaratHunter
Plans
Cushion|Lab Grown|IGI

0.66ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG805673495

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG805673495

Diamond specifications and retailer prices

From £105 GBP
HK$1,100 HKD
As of November 1, 2026
Save £151 GBP (59%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £672 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 0.66ct lab-grown cushion diamond

This 0.66ct lab-grown cushion sits in the half to three-quarter carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG805673495 or 805673495. Listed at 9 retailers as of November 1, 2026, with a 144% 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36.5°
Pavilion angle33.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG805673495
Dimensions4.95 × 4.90 × 3.10 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
4.95 mm4.90 mm0.66 ctF / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG805673495
Side View
Table 70.0%Crown 36.5°Girdle: MED-STKPavilion 33.8°Culet: NoneDepth 63.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £672 GBP|Low: £105 GBP|High: £686 GBP|Avg: £256 GBP|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 9£105 GBP
Retailer 3£167 GBP
Retailer 6£175 GBP
Retailer 8£187 GBP
Retailer 2£205 GBP
Retailer 7£225 GBP
Retailer 4£253 GBP
Retailer 5£256 GBP
MOH London£672 GBP

42 data points across 9 retailers

9 retailers£105 GBP to £256 GBP

A
Cheapest Retailer
-
£105 GBP
HK$1,100 HKD
A
Retailer 2
-
£167 GBP
€213 EUR
View
A
Retailer 3
-
£175 GBP
View
Retailer 4
-
£187 GBP
$251 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
£205 GBP
$275 USD
View
Retailer 6
-
£225 GBP
View
Price last confirmed 7 days ago
A
Retailer 7
-
£253 GBP
$340 USD
View
A
Retailer 8
-
£256 GBP
SGD 465 SGD
View
Most Expensive
MOH London
LG805673495 · Oct 26
£672 GBP
View
Price last confirmed 7 days ago
8 more retailers have this diamond
Prices start from £105 GBPSave up to £151 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 Cushion
£105 GBP