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0.66ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 6562043215

Certificate GIA 6562043215

Diamond specifications and retailer prices

From £345 GBP
SGD 625 SGD
As of October 31, 2026
Save £347 GBP (50%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £691 GBP at Frank Darling · As of November 2, 2026
View at Frank Darling

About this 0.66ct natural round diamond

This 0.66ct natural round sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6562043215. Listed at 9 retailers as of October 31, 2026, with prices from £345 to £691, a £347 spread on the same certified stone. Frank Darling lists it at £691. 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
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6562043215
Dimensions5.59 × 5.61 × 3.44 mm
L/W Ratio1.00
Culet sizeNone
Top View
5.59 mm5.61 mm0.66 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6562043215
Side View
Table 56.0%Crown 34°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.4%

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: £691 GBP|Low: £276 GBP|High: £713 GBP|Avg: £476 GBP|-3.1%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 10£276 GBP
Retailer 4£345 GBP
Retailer 9£371 GBP
Retailer 3£384 GBP
Retailer 8£459 GBP
Retailer 7£484 GBP
Retailer 2£530 GBP
Retailer 5£544 GBP
Retailer 6£562 GBP
Frank Darling£691 GBP

31 data points across 10 retailers

9 retailers£345 GBP to £691 GBP

A
Cheapest Retailer
-
£345 GBP
SGD 625 SGD
A
Retailer 2
-
£371 GBP
SGD 673 SGD
View
A
Retailer 3
-
£384 GBP
$515 USD
View
A
Retailer 4
-
£459 GBP
$616 USD
View
A
Retailer 5
-
£484 GBP
$649 USD
View
A
Retailer 6
-
£530 GBP
€677 EUR
View
A
Retailer 7
-
£544 GBP
View
Retailer 8
-
£562 GBP
$754 USD
View
Price last confirmed 7 days ago
Most Expensive
B+
Frank Darling
2678820HK · Nov 2
£691 GBP
$928 USD
View
8 more retailers have this diamond
Prices start from £345 GBPSave up to £347 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
£345 GBP