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Oval|Natural|GIA

0.66ct F SI2 Oval Natural Diamond

EX • F/SI2 • GIA 7566579428

Certificate GIA 7566579428

Diamond specifications and retailer prices

From £552 GBP
$741 USD
As of October 31, 2026
Save £359 GBP (39%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £911 GBP at Frank Darling · As of November 2, 2026
View at Frank Darling

About this 0.66ct natural oval diamond

This 0.66ct natural oval sits in the half to three-quarter carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7566579428. Listed at 11 retailers as of October 31, 2026, with prices from £552 to £911, a £359 spread on the same certified stone. Frank Darling lists it at £911. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
Crown angle38.33°
Pavilion angle40.07°
OriginNatural
Grading LabGIA
CertificateGIA 7566579428
Dimensions6.80 × 4.89 × 3.05 mm
L/W Ratio1.39
Culet sizeNone
Top View
6.80 mm4.89 mm0.66 ctF / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7566579428
Side View
Table 58.0%Crown 38.33°Girdle: THN-THKPavilion 40.07°Culet: NoneDepth 62.3%

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: Oct 31
Current: £911 GBP|Low: £552 GBP|High: £911 GBP|Avg: £711 GBP
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 10£552 GBP
Retailer 5£600 GBP
Retailer 9£602 GBP
Retailer 8£615 GBP
Retailer 3£668 GBP
Retailer 4£693 GBP
Retailer 7£695 GBP
Retailer 2£808 GBP
Retailer 6£900 GBP
Frank Darling£911 GBP

17 data points across 10 retailers

11 retailers£552 GBP to £911 GBP

A
Cheapest Retailer
-
£552 GBP
$741 USD
A
Retailer 2
-
£581 GBP
SGD 1,054 SGD
View
A
Retailer 3
-
£600 GBP
$805 USD
View
A
Retailer 4
-
£602 GBP
SGD 1,092 SGD
View
A
Retailer 5
-
£615 GBP
$825 USD
View
B+
Retailer 6
-
£668 GBP
View
B+
Retailer 7
-
£693 GBP
$930 USD
View
B+
Retailer 8
-
£695 GBP
$933 USD
View
B+
Retailer 9
-
£808 GBP
€1,033 EUR
View
B+
Retailer 10
-
£900 GBP
$1,208 USD
View
Most Expensive
B
Frank Darling
2702948HK · Nov 2
£911 GBP
$1,223 USD
View
10 more retailers have this diamond
Prices start from £552 GBPSave up to £359 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 Oval
£552 GBP