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Round|Natural|GIA

0.66ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1555153399

Certificate GIA 1555153399

Diamond specifications and retailer prices

From $1,265 CAD
$905 USD
As of November 1, 2026
Save $2,656 CAD (68%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,921 CAD 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1555153399. Listed at 12 retailers as of October 30, 2026, with prices from $1,265 to $3,921, a $2,656 spread on the same certified stone. NZ Jewellers lists it at $3,921. 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
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1555153399
Dimensions5.62 × 5.58 × 3.45 mm
L/W Ratio1.01
Culet sizeNone
Top View
5.62 mm5.58 mm0.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1555153399
Side View
Table 57.0%CrownGirdle: MED-SLIPavilionCulet: NoneDepth 61.6%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: $3,921 CAD|Low: $1,189 CAD|High: $3,921 CAD|Avg: $1,908 CAD|+6.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 8$1,265 CAD
Retailer 7$1,298 CAD
Retailer 2$1,442 CAD
Retailer 6$1,444 CAD
Retailer 9$1,474 CAD
Retailer 3$1,755 CAD
Retailer 10$1,763 CAD
Retailer 5$1,868 CAD
Retailer 4$2,291 CAD
NZ Jewellers$3,921 CAD

45 data points across 10 retailers

12 retailers$1,265 CAD to $3,921 CAD

Retailer 1
-
$1,167 CAD
$835 USD
Price last confirmed 39 days ago
Retailer 2
-
$1,172 CAD
$839 USD
View
Price last confirmed 48 days ago
B+
Retailer 3
-
$1,265 CAD
$905 USD
View
B+
Retailer 4
-
$1,298 CAD
$929 USD
View
B+
Retailer 5
-
$1,442 CAD
£813 GBP
View
B+
Retailer 6
-
$1,444 CAD
$1,033 USD
View
B+
Retailer 7
-
$1,474 CAD
$1,055 USD
View
B+
Retailer 8
-
$1,755 CAD
€1,196 EUR
View
Retailer 9
-
$1,763 CAD
A$1,941 AUD
View
Price last confirmed 28 days ago
B
Retailer 10
-
$1,868 CAD
ZAR 21,591 ZAR
View
B
Retailer 11
-
$2,291 CAD
£1,291 GBP
View
Most Expensive
B
NZ Jewellers
3885b89d-0411-49f5-951e-d22d72438c8e · Oct 30
$3,921 CAD
$2,806 USD
View
11 more retailers have this diamond
Prices start from $1,265 CADSave up to $2,656 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
$1,265 CAD