Round|Natural|GIA

1.00ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 2558368590

Certificate GIA 2558368590

Diamond specifications and retailer prices

From $3,324 CAD
As of November 4, 2026
Save $4,010 CAD (55%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $8,616 CAD at NZ Jewellers · As of September 27, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2558368590. Listed at 20 retailers as of November 4, 2026, with a 121% 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
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2558368590
Dimensions6.46 × 6.42 × 3.92 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.46 mm6.42 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2558368590
Side View
Table 59.0%Crown 31.5°Girdle: Slightly ThickPavilion 41.6°Culet: NoneDepth 60.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $4,815 CAD|Low: $3,307 CAD|High: $8,181 CAD|Avg: $4,753 CAD|-10.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 5, 2026
Retailer 15$3,324 CAD
Retailer 3$3,567 CAD
Retailer 16$3,627 CAD
Retailer 6$3,677 CAD
Retailer 17$3,684 CAD
Retailer 13$3,903 CAD
Retailer 9$3,945 CAD
Retailer 11$4,524 CAD
Retailer 2$4,539 CAD
Retailer 4$4,539 CAD
Retailer 5$4,693 CAD
Retailer 1$4,815 CAD
Retailer 14$5,212 CAD
Retailer 8$5,296 CAD
Retailer 7$5,335 CAD
Retailer 10$5,366 CAD
Retailer 12$7,334 CAD

30 data points across 17 retailers

20 retailers$3,324 CAD to $7,334 CAD

A
Cheapest Retailer
-
$3,324 CAD
A
Retailer 2
-
$3,567 CAD
View
A
Retailer 3
-
$3,627 CAD
View
A
Retailer 4
-
$3,677 CAD
View
Final sale: no returns
A
Retailer 5
-
$3,684 CAD
View
A
Retailer 6
-
$3,903 CAD
View
Retailer 7
-
$4,480 CAD
View
Price last confirmed 36 days ago
A
Retailer 8
-
$4,524 CAD
View
A
Retailer 9
-
$4,539 CAD
View
B+
Retailer 10
-
$4,539 CAD
View
Retailer 11
-
$4,652 CAD
View
Price last confirmed 38 days ago
B+
Retailer 12
-
$4,693 CAD
View
B+
Retailer 13
-
$4,815 CAD
View
Retailer 14
-
$5,169 CAD
View
Price last confirmed 38 days ago
B+
Retailer 15
-
$5,212 CAD
View
Retailer 16
-
$5,296 CAD
View
Price last confirmed 35 days ago
Retailer 17
-
$5,335 CAD
View
Price last confirmed 14 days ago
B+
Retailer 18
-
$5,366 CAD
View
B
Retailer 19
-
$7,334 CAD
View
Most Expensive
NZ Jewellers
edd1479b-0c61-4ddb-aba2-9fc4530b17a1 · Sep 27
$8,616 CAD
$6,169 USD
View
Price last confirmed 40 days ago
19 more retailers have this diamond
Prices start from $3,324 CADSave up to $4,010 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
$3,324 CAD