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Round|Natural|GIA

0.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 7426956403

Certificate GIA 7426956403

Diamond specifications and retailer prices

From $1,175 CAD
As of November 4, 2026
Save $1,396 CAD (54%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,570 CAD at MOH London · As of November 4, 2026
View at MOH London

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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7426956403. Listed at 12 retailers as of November 4, 2026, with prices from $1,175 to $2,570, a $1,396 spread on the same certified stone. MOH London lists it at $2,570. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle34°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 7426956403
Dimensions5.18 × 5.14 × 3.16 mm
L/W Ratio1.01
Top View
5.18 mm5.14 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 7426956403
Side View
Table 56.0%Crown 34°Girdle: MediumPavilion 41.2°Culet: NoneDepth 61.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $2,570 CAD|Low: $1,004 CAD|High: $2,606 CAD|Avg: $1,688 CAD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 6$1,175 CAD
Retailer 5$1,187 CAD
Retailer 4$1,300 CAD
Retailer 7$1,323 CAD
Retailer 3$1,637 CAD
Retailer 2$1,828 CAD
MOH London$2,570 CAD

42 data points across 7 retailers

12 retailers$1,175 CAD to $2,570 CAD

B+
Cheapest Retailer
-
$1,175 CAD
Final sale: no returns
B+
Retailer 2
-
$1,187 CAD
View
B+
Retailer 3
-
$1,300 CAD
View
B+
Retailer 4
-
$1,323 CAD
View
Retailer 5
-
$1,469 CAD
View
Price last confirmed 10 days ago
B
Retailer 6
-
$1,564 CAD
View
B
Retailer 7
-
$1,564 CAD
View
B
Retailer 8
-
$1,620 CAD
View
B
Retailer 9
-
$1,637 CAD
View
B
Retailer 10
-
$1,828 CAD
View
Most Expensive
B
MOH London
F91F95726 · Nov 4
$2,570 CAD
£1,449 GBP
View
10 more retailers have this diamond
Prices start from $1,175 CADSave up to $1,396 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.

B+
0.51ct Round
$1,175 CAD