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Round|Natural|GIA

1.00ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1559065480

Certificate GIA 1559065480

Diamond specifications and retailer prices

From $1,859 CAD
As of November 4, 2026
Save $2,458 CAD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $6,071 CAD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1559065480. Listed at 20 retailers as of November 2, 2026, with a 132% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.00
Carat
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 1559065480
Dimensions6.33 × 6.38 × 4.01 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Cavity, Needle, Indented Natural, Natural
Top View
6.33 mm6.38 mm1.00 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1559065480
Side View
Table 58.0%Crown 34.5°Girdle: THN-STKPavilion 41.8°Culet: NoneDepth 63.1%

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: Nov 4
Current: $2,014 CAD|Low: $1,859 CAD|High: $4,412 CAD|Avg: $2,740 CAD|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 9$1,859 CAD
Retailer 7$1,962 CAD
Retailer 1$2,014 CAD
Retailer 4$2,370 CAD
Retailer 11$2,405 CAD
Retailer 3$2,486 CAD
Retailer 2$2,655 CAD
Retailer 5$2,723 CAD
Retailer 10$3,000 CAD
Retailer 6$3,350 CAD
Retailer 8$4,317 CAD

28 data points across 11 retailers

20 retailers$1,859 CAD to $4,317 CAD

A
Cheapest Retailer
-
$1,859 CAD
A
Retailer 2
-
$1,962 CAD
View
A
Retailer 3
-
$2,014 CAD
View
B+
Retailer 4
-
$2,345 CAD
View
B+
Retailer 5
-
$2,346 CAD
View
A
Retailer 6
-
$2,370 CAD
View
B+
Retailer 7
-
$2,405 CAD
View
B+
Retailer 8
-
$2,486 CAD
View
Retailer 9
-
$2,489 CAD
View
Price last confirmed 39 days ago
Retailer 10
-
$2,489 CAD
View
Price last confirmed 36 days ago
Retailer 11
-
$2,592 CAD
View
Price last confirmed 10 days ago
Retailer 12
-
$2,605 CAD
View
Price last confirmed 38 days ago
B+
Retailer 13
-
$2,655 CAD
View
B+
Retailer 14
-
$2,723 CAD
View
Retailer 15
-
$2,873 CAD
View
Price last confirmed 39 days ago
Retailer 16
-
$2,873 CAD
View
Price last confirmed 38 days ago
Retailer 17
-
$3,000 CAD
View
Price last confirmed 11 days ago
B
Retailer 18
-
$3,350 CAD
View
B
Retailer 19
-
$4,317 CAD
View
Most Expensive
NZ Jewellers
5a5dec67-3276-44b6-9378-734f69422a74 · Sep 28
$6,071 CAD
$4,347 USD
View
Price last confirmed 39 days ago
19 more retailers have this diamond
Prices start from $1,859 CADSave up to $2,458 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.

A
1.00ct Round
$1,859 CAD