Oval|Natural|GIA

0.66ct F SI2 Oval Natural Diamond

EX • F/SI2 • GIA 7566579428

Certificate GIA 7566579428

Diamond specifications and retailer prices

From $741 USD
As of October 31, 2026
Save $482 USD (39%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,223 USD 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 $741 to $1,223, a $482 spread on the same certified stone. Frank Darling lists it at $1,223. 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
Color
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
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Price History

Last verified: Oct 31
Current: $1,223 USD|Low: $741 USD|High: $1,223 USD|Avg: $954 USD
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$741 USD
Retailer 5$805 USD
Retailer 9$808 USD
Retailer 8$825 USD
Retailer 3$896 USD
Retailer 4$930 USD
Retailer 7$933 USD
Retailer 2$1,085 USD
Retailer 6$1,208 USD
Frank Darling$1,223 USD

17 data points across 10 retailers

11 retailers$741 USD to $1,223 USD

A
Cheapest Retailer
-
$741 USD
A
Retailer 2
-
$780 USD
SGD 1,054 SGD
View
A
Retailer 3
-
$805 USD
View
A
Retailer 4
-
$808 USD
SGD 1,092 SGD
View
A
Retailer 5
-
$825 USD
View
B+
Retailer 6
-
$896 USD
£706 GBP
View
B+
Retailer 7
-
$930 USD
View
B+
Retailer 8
-
$933 USD
View
B+
Retailer 9
-
$1,085 USD
€1,033 EUR
View
Retailer 10
-
$1,208 USD
View
Price last confirmed 7 days ago
Most Expensive
B
Frank Darling
2702948HK · Nov 2
$1,223 USD
View
10 more retailers have this diamond
Prices start from $741 USDSave up to $482 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 Oval
$741 USD