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Round|Natural|GIA

0.66ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2564425219

Certificate GIA 2564425219

Diamond specifications and retailer prices

From £429 GBP
HK$4,500 HKD
As of November 1, 2026
Save £1,353 GBP (76%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,782 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

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 2564425219. Listed at 18 retailers as of October 30, 2026, with prices from £429 to £1,782, a £1,353 spread on the same certified stone. NZ Jewellers lists it at £1,782. 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 angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2564425219
Dimensions5.58 × 5.62 × 3.44 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Feather, Crystal, Knot
Top View
5.58 mm5.62 mm0.66 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2564425219
Side View
Table 59.0%Crown 34°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 61.5%

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: £1,782 GBP|Low: £429 GBP|High: £1,785 GBP|Avg: £675 GBP|-0.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 2, 2026
Retailer 10£429 GBP
Retailer 2£430 GBP
Retailer 18£503 GBP
Retailer 3£520 GBP
Retailer 8£539 GBP
Retailer 6£569 GBP
Retailer 5£573 GBP
Retailer 11£586 GBP
Retailer 7£589 GBP
Retailer 9£651 GBP
Retailer 15£663 GBP
Retailer 4£667 GBP
Retailer 17£674 GBP
Retailer 13£674 GBP
Retailer 12£730 GBP
Retailer 14£746 GBP
Retailer 16£1,033 GBP
NZ Jewellers£1,782 GBP

24 data points across 18 retailers

18 retailers£429 GBP to £1,782 GBP

A
Cheapest Retailer
-
£429 GBP
HK$4,500 HKD
A
Retailer 2
-
£430 GBP
₹54,965 INR
View
A
Retailer 3
-
£503 GBP
$675 USD
View
A
Retailer 4
-
£520 GBP
$698 USD
View
Final sale: no returns
A
Retailer 5
-
£539 GBP
A$1,113 AUD
View
A
Retailer 6
-
£569 GBP
$763 USD
View
A
Retailer 7
-
£573 GBP
$769 USD
View
A
Retailer 8
-
£586 GBP
$786 USD
View
A
Retailer 9
-
£589 GBP
$791 USD
View
B+
Retailer 10
-
£651 GBP
$873 USD
View
A
Retailer 11
-
£663 GBP
$889 USD
View
A
Retailer 12
-
£667 GBP
View
B+
Retailer 13
-
£674 GBP
$904 USD
View
B+
Retailer 14
-
£674 GBP
View
B+
Retailer 15
-
£730 GBP
View
B+
Retailer 16
-
£746 GBP
€953 EUR
View
B
Retailer 17
-
£1,033 GBP
View
Most Expensive
B
NZ Jewellers
0fcc5155-f3b0-456c-ae41-b3fa574cead4 · Oct 30
£1,782 GBP
$2,392 USD
View
17 more retailers have this diamond
Prices start from £429 GBPSave up to £1,353 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
£429 GBP