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0.66ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2566134555

Certificate GIA 2566134555

Diamond specifications and retailer prices

From €663 EUR
$744 USD
As of October 31, 2026
Save €430 EUR (39%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €1,093 EUR 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 2566134555. Listed at 11 retailers as of October 31, 2026, with prices from €663 to €1,093, a €430 spread on the same certified stone. Frank Darling lists it at €1,093. 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
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2566134555
Dimensions5.67 × 5.71 × 3.42 mm
L/W Ratio1.01
Culet sizeNone
Top View
5.67 mm5.71 mm0.66 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566134555
Side View
Table 59.0%Crown 32.5°Girdle: THN-MEDPavilion 41.4°Culet: NoneDepth 60.1%

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: €1,093 EUR|Low: €663 EUR|High: €1,128 EUR|Avg: €864 EUR|-3.1%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 9€663 EUR
Retailer 6€698 EUR
Retailer 3€723 EUR
Retailer 10€738 EUR
Retailer 2€804 EUR
Retailer 4€834 EUR
Retailer 11€835 EUR
Retailer 7€951 EUR
Retailer 5€967 EUR
Retailer 8€1,071 EUR
Frank Darling€1,093 EUR

30 data points across 11 retailers

11 retailers€663 EUR to €1,093 EUR

A
Cheapest Retailer
-
€663 EUR
$744 USD
A
Retailer 2
-
€698 EUR
SGD 1,058 SGD
View
A
Retailer 3
-
€723 EUR
SGD 1,096 SGD
View
A
Retailer 4
-
€738 EUR
$828 USD
View
B+
Retailer 5
-
€804 EUR
£710 GBP
View
B+
Retailer 6
-
€834 EUR
$935 USD
View
B+
Retailer 7
-
€835 EUR
$937 USD
View
B+
Retailer 8
-
€951 EUR
£840 GBP
View
B+
Retailer 9
-
€967 EUR
View
Retailer 10
-
€1,071 EUR
$1,201 USD
View
Price last confirmed 7 days ago
Most Expensive
B+
Frank Darling
2677081HK · Nov 2
€1,093 EUR
$1,226 USD
View
10 more retailers have this diamond
Prices start from €663 EURSave up to €430 EUR

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
€663 EUR