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Round|Natural|GIA

1.00ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 2557652255

Certificate GIA 2557652255

Diamond specifications and retailer prices

From $4,200 CAD
As of November 5, 2026
Save $5,525 CAD (57%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $10,131 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557652255. Listed at 24 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
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2557652255
Dimensions6.36 × 6.42 × 4.01 mm
L/W Ratio1.01
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Needle
Top View
6.36 mm6.42 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557652255
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.7%

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 5
Current: $5,370 CAD|Low: $4,200 CAD|High: $9,829 CAD|Avg: $6,220 CAD|-5.0%
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
November 6, 2026
Retailer 12$4,200 CAD
Retailer 13$4,201 CAD
Retailer 4$4,666 CAD
Retailer 3$4,938 CAD
Retailer 5$5,180 CAD
Retailer 7$5,286 CAD
Retailer 2$5,349 CAD
Retailer 1$5,370 CAD
Retailer 8$5,616 CAD
Retailer 14$5,817 CAD
Retailer 9$6,162 CAD
Retailer 11$6,412 CAD
Retailer 10$6,850 CAD
Retailer 6$9,725 CAD

25 data points across 14 retailers

24 retailers$4,200 CAD to $9,725 CAD

A
Cheapest Retailer
-
$4,200 CAD
A
Retailer 2
-
$4,201 CAD
View
B+
Retailer 3
-
$4,666 CAD
View
B+
Retailer 4
-
$4,938 CAD
View
B+
Retailer 5
-
$5,180 CAD
View
Final sale: no returns
B+
Retailer 6
-
$5,286 CAD
View
B+
Retailer 7
-
$5,349 CAD
View
B+
Retailer 8
-
$5,370 CAD
View
B+
Retailer 9
-
$5,490 CAD
View
Retailer 10
-
$5,613 CAD
View
Price last confirmed 43 days ago
Retailer 11
-
$5,613 CAD
View
Price last confirmed 38 days ago
B+
Retailer 12
-
$5,616 CAD
View
Retailer 13
-
$5,815 CAD
View
Price last confirmed 29 days ago
Retailer 14
-
$5,815 CAD
View
Price last confirmed 29 days ago
B+
Retailer 15
-
$5,817 CAD
View
B+
Retailer 16
-
$6,162 CAD
View
Retailer 17
-
$6,234 CAD
View
Price last confirmed 33 days ago
B+
Retailer 18
-
$6,412 CAD
View
Retailer 19
-
$6,709 CAD
View
Price last confirmed 45 days ago
Retailer 20
-
$6,709 CAD
View
Price last confirmed 33 days ago
B+
Retailer 21
-
$6,850 CAD
View
B
Retailer 22
-
$9,725 CAD
View
Retailer 23
-
$9,778 CAD
View
Price last confirmed 41 days ago
Most Expensive
NZ Jewellers
c622d397-570c-4952-9c80-b0d5219df204 · Oct 3
$10,131 CAD
$7,254 USD
View
Price last confirmed 34 days ago
23 more retailers have this diamond
Prices start from $4,200 CADSave up to $5,525 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
$4,200 CAD