Round|Natural|GIA

0.66ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 5556556629

Certificate GIA 5556556629

Diamond specifications and retailer prices

From $1,413 CAD
$1,011 USD
As of November 2, 2026
9 retailers carry this diamond
Most expensive: $1,745 CAD at Wholesale Diamonds Direct · As of October 16, 2026
View at Wholesale Diamonds Direct

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5556556629. Listed at 9 retailers as of November 2, 2026. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 5556556629
Dimensions5.57 × 3.48 × 3.48 mm
L/W Ratio1.60
Culet sizeNone
Top View
5.57 mm3.48 mm0.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5556556629
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $1,535 CAD|Low: $1,077 CAD|High: $1,799 CAD|Avg: $1,452 CAD|-2.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Wholesale Diamonds Direct
October 20, 2026
Retailer 6$1,077 CAD
Retailer 7$1,128 CAD
Retailer 10$1,173 CAD
Retailer 9$1,198 CAD
Retailer 5$1,210 CAD
Retailer 4$1,251 CAD
Retailer 2$1,381 CAD
Retailer 1$1,535 CAD
Retailer 3$1,599 CAD
Retailer 8$1,642 CAD
Wholesale Diamonds Direct$1,745 CAD
Retailer 11$1,752 CAD

33 data points across 12 retailers

9 retailers

Retailer 1
-
$1,077 CAD
$771 USD
Price last confirmed 16 days ago
Retailer 2
-
$1,128 CAD
SGD 1,091 SGD
View
Price last confirmed 11 days ago
Retailer 3
-
$1,173 CAD
SGD 1,134 SGD
View
Price last confirmed 14 days ago
Retailer 4
-
$1,198 CAD
$857 USD
View
Price last confirmed 13 days ago
Retailer 5
-
$1,210 CAD
$866 USD
View
Price last confirmed 13 days ago
Retailer 6
-
$1,251 CAD
£705 GBP
View
Price last confirmed 14 days ago
B+
Retailer 7
-
$1,413 CAD
$1,011 USD
View
Retailer 8
-
$1,535 CAD
£865 GBP
View
Price last confirmed 13 days ago
Most Expensive
Wholesale Diamonds Direct
272646166 · Oct 16
$1,745 CAD
$1,249 USD
View
Price last confirmed 17 days ago
8 more retailers have this diamond
Prices start from $1,413 CAD

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.

B+
0.66ct Round
$1,413 CAD