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Marquise|Natural|GIA

0.51ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 6565212812

Certificate GIA 6565212812

Diamond specifications and retailer prices

From $817 CAD
As of November 5, 2026
Save $2,465 CAD (75%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,727 CAD at MOH London · As of November 2, 2026
View at MOH London

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6565212812. Listed at 15 retailers as of November 5, 2026, with a 302% 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
E
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6565212812
Dimensions8.68 × 4.06 × 2.46 mm
L/W Ratio2.14
Culet sizeNone
Top View
8.68 mm4.06 mm0.51 ctE / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6565212812
Side View
Table 59.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 60.7%

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: $3,727 CAD|Low: $817 CAD|High: $3,727 CAD|Avg: $1,574 CAD
MOH London
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 8$817 CAD
Retailer 6$1,020 CAD
Retailer 2$1,425 CAD
Retailer 7$1,504 CAD
Retailer 4$1,864 CAD
Retailer 10$1,964 CAD
Retailer 13$2,127 CAD
Retailer 3$2,165 CAD
Retailer 14$2,249 CAD
Retailer 5$2,454 CAD
Retailer 11$2,610 CAD
Retailer 12$2,617 CAD
Retailer 9$3,282 CAD
MOH London$3,727 CAD

39 data points across 14 retailers

15 retailers$817 CAD to $3,282 CAD

A
Cheapest Retailer
-
$817 CAD
A
Retailer 2
-
$992 CAD
View
Retailer 3
-
$1,020 CAD
View
Price last confirmed 18 days ago
B+
Retailer 4
-
$1,425 CAD
View
B+
Retailer 5
-
$1,504 CAD
View
B
Retailer 6
-
$1,864 CAD
View
B
Retailer 7
-
$1,964 CAD
View
Final sale: no returns
B
Retailer 8
-
$2,127 CAD
View
B
Retailer 9
-
$2,165 CAD
View
B
Retailer 10
-
$2,249 CAD
View
B
Retailer 11
-
$2,454 CAD
View
B
Retailer 12
-
$2,610 CAD
View
B
Retailer 13
-
$2,617 CAD
View
C
Retailer 14
-
$3,282 CAD
View
Most Expensive
MOH London
239CFF363 · Nov 2
$3,727 CAD
£2,101 GBP
View
Price under review
14 more retailers have this diamond
Prices start from $817 CADSave up to $2,465 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 Marquise
$817 CAD