CaratHunter
Plans
Round|Natural|GIA

4.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1232890642

Certificate GIA 1232890642

Diamond specifications and retailer prices

From $66,049 CAD
As of November 4, 2026
Save $47,472 CAD (42%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $113,521 CAD at MOH London · As of November 4, 2026
View at MOH London

About this 4.51ct natural round diamond

This 4.51ct natural round sits in the three to five carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1232890642. Listed at 12 retailers as of November 4, 2026, with prices from $66,049 to $113,521, a $47,472 spread on the same certified stone. MOH London lists it at $113,521. 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

4.51
Carat
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 1232890642
Dimensions10.60 × 10.64 × 6.52 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Natural
Top View
10.60 mm10.64 mm4.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1232890642
Side View
Table 60.0%Crown 34°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 61.4%

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: $113,521 CAD|Low: $66,049 CAD|High: $115,197 CAD|Avg: $82,865 CAD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7$66,049 CAD
Retailer 3$71,788 CAD
Retailer 5$75,919 CAD
Retailer 6$75,919 CAD
Retailer 8$78,957 CAD
Retailer 9$81,993 CAD
Retailer 4$87,857 CAD
Retailer 2$90,702 CAD
MOH London$113,521 CAD

42 data points across 9 retailers

12 retailers$66,049 CAD to $113,521 CAD

B+
Cheapest Retailer
-
$66,049 CAD
B
Retailer 2
-
$70,577 CAD
View
B+
Retailer 3
-
$71,788 CAD
View
Retailer 4
-
$72,883 CAD
View
Price last confirmed 8 days ago
Retailer 5
-
$73,490 CAD
View
Price last confirmed 9 days ago
B
Retailer 6
-
$75,919 CAD
View
B
Retailer 7
-
$75,919 CAD
View
B
Retailer 8
-
$78,957 CAD
View
B
Retailer 9
-
$81,993 CAD
View
B
Retailer 10
-
$87,857 CAD
View
B
Retailer 11
-
$90,702 CAD
View
Most Expensive
B
MOH London
57A3B7F92 · Nov 4
$113,521 CAD
£64,003 GBP
View
11 more retailers have this diamond
Prices start from $66,049 CADSave up to $47,472 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+
4.51ct Round
$66,049 CAD