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Round|Natural|GIA

1.00ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2558715221

Certificate GIA 2558715221

Diamond specifications and retailer prices

From $2,145 CAD
As of November 6, 2026
Save $2,862 CAD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $5,991 CAD at NZ Jewellers · As of October 3, 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 2558715221. Listed at 20 retailers as of November 4, 2026, with a 133% 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
FluorescenceNone
Crown angle33.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 2558715221
Dimensions6.40 × 6.46 × 3.93 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather
Top View
6.40 mm6.46 mm1.00 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2558715221
Side View
Table 61.0%Crown 33.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 61.1%

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 6
Current: $2,236 CAD|Low: $2,145 CAD|High: $5,081 CAD|Avg: $3,266 CAD|-3.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 7$2,145 CAD
Retailer 1$2,236 CAD
Retailer 5$2,641 CAD
Retailer 8$2,742 CAD
Retailer 2$3,095 CAD
Retailer 4$3,497 CAD
Retailer 3$3,884 CAD
Retailer 6$5,007 CAD

35 data points across 8 retailers

20 retailers$2,145 CAD to $5,007 CAD

A
Cheapest Retailer
-
$2,145 CAD
A
Retailer 2
-
$2,236 CAD
View
B+
Retailer 3
-
$2,641 CAD
View
B+
Retailer 4
-
$2,683 CAD
View
B+
Retailer 5
-
$2,688 CAD
View
B+
Retailer 6
-
$2,742 CAD
View
B+
Retailer 7
-
$2,863 CAD
View
Retailer 8
-
$2,866 CAD
View
Price last confirmed 39 days ago
Retailer 9
-
$2,866 CAD
View
Price last confirmed 28 days ago
Retailer 10
-
$2,866 CAD
View
Price last confirmed 25 days ago
B+
Retailer 11
-
$2,986 CAD
View
Retailer 12
-
$2,999 CAD
View
Price last confirmed 38 days ago
B+
Retailer 13
-
$3,059 CAD
View
B+
Retailer 14
-
$3,095 CAD
View
Retailer 15
-
$3,307 CAD
View
Price last confirmed 38 days ago
B+
Retailer 16
-
$3,497 CAD
View
B
Retailer 17
-
$3,884 CAD
View
B
Retailer 18
-
$5,007 CAD
View
Retailer 19
-
$5,991 CAD
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
7368ce97-3a06-415c-8add-e03809881242 · Oct 3
$5,991 CAD
$4,290 USD
View
Price last confirmed 34 days ago
19 more retailers have this diamond
Prices start from $2,145 CADSave up to $2,862 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
$2,145 CAD