Round|Natural|GIA

0.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2556603477

Certificate GIA 2556603477

Diamond specifications and retailer prices

From $715 CAD
$512 USD
As of October 29, 2026
Save $2,225 CAD (76%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $3,200 CAD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556603477. Listed at 20 retailers as of October 29, 2026, with a 311% 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

0.51
Carat
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2556603477
Dimensions5.06 × 5.10 × 3.16 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Cloud
Top View
5.06 mm5.10 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556603477
Side View
Table 61.0%Crown 34.5°Girdle: Slightly ThickPavilion 41.6°Culet: NoneDepth 62.3%

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: Oct 29
Current: $1,218 CAD|Low: $650 CAD|High: $1,891 CAD|Avg: $1,331 CAD|+5.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 6$715 CAD
Retailer 5$1,180 CAD
Retailer 1$1,218 CAD
Retailer 3$1,329 CAD
Retailer 8$1,426 CAD
Retailer 7$1,535 CAD
Retailer 2$1,575 CAD
Retailer 4$1,879 CAD

41 data points across 8 retailers

20 retailers$715 CAD to $2,940 CAD

A
Cheapest Retailer
-
$715 CAD
$512 USD
Final sale: no returns
Retailer 2
-
$908 CAD
$650 USD
View
Price last confirmed 11 days ago
Retailer 3
-
$925 CAD
$662 USD
View
Price last confirmed 15 days ago
Retailer 4
-
$925 CAD
$662 USD
View
Price last confirmed 61 days ago
B+
Retailer 5
-
$947 CAD
$678 USD
View
Retailer 6
-
$960 CAD
$687 USD
View
Price last confirmed 16 days ago
Retailer 7
-
$1,067 CAD
$764 USD
View
Price last confirmed 39 days ago
Retailer 8
-
$1,077 CAD
$771 USD
View
Price last confirmed 13 days ago
B+
Retailer 9
-
$1,134 CAD
$812 USD
View
B
Retailer 10
-
$1,180 CAD
$845 USD
View
B
Retailer 11
-
$1,218 CAD
£687 GBP
View
B
Retailer 12
-
$1,225 CAD
$877 USD
View
B
Retailer 13
-
$1,296 CAD
$928 USD
View
B+
Retailer 14
-
$1,329 CAD
€906 EUR
View
B
Retailer 15
-
$1,426 CAD
$1,021 USD
View
Retailer 16
-
$1,535 CAD
A$1,690 AUD
View
Price last confirmed 27 days ago
B
Retailer 17
-
$1,575 CAD
ZAR 18,217 ZAR
View
Retailer 18
-
$1,879 CAD
£1,059 GBP
View
Price last confirmed 10 days ago
B
Retailer 19
-
$2,940 CAD
View
Most Expensive
NZ Jewellers
9d058924-124d-4d64-be57-fd7bf0c3d098 · Oct 17
$3,200 CAD
$2,291 USD
View
Price under review
19 more retailers have this diamond
Prices start from $715 CADSave up to $2,225 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
0.51ct Round
$715 CAD