CaratHunter
Plans
Marquise|Natural|GIA

0.51ct E SI2 Marquise Natural Diamond

EX • E/SI2 • GIA 6545321237

Certificate GIA 6545321237

Diamond specifications and retailer prices

From $1,051 AUD
As of November 5, 2026
Save $1,196 AUD (53%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,248 AUD at Diamond Exchange Canada · As of November 5, 2026
View at Diamond Exchange Canada

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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545321237. Listed at 11 retailers as of November 5, 2026, with prices from $1,051 to $2,248, a $1,196 spread on the same certified stone. Diamond Exchange Canada lists it at $2,248. 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
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Pavilion angle41.3°
OriginNatural
Grading LabGIA
CertificateGIA 6545321237
Dimensions8.19 × 4.21 × 2.68 mm
L/W Ratio1.95
Top View
8.19 mm4.21 mm0.51 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6545321237
Side View
Table 58.0%CrownGirdle: MED-VTKPavilion 41.3°Culet: NoneDepth 63.5%

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: $2,248 AUD|Low: $731 AUD|High: $2,248 AUD|Avg: $1,442 AUD
Diamond Exchange Canada
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 6, 2026
Retailer 10$731 AUD
Retailer 11$1,051 AUD
Retailer 15$1,163 AUD
Retailer 8$1,219 AUD
Retailer 5$1,236 AUD
Retailer 3$1,249 AUD
Retailer 13$1,273 AUD
Retailer 18$1,273 AUD
Retailer 9$1,321 AUD
Retailer 12$1,431 AUD
Retailer 16$1,523 AUD
Retailer 4$1,543 AUD
Retailer 7$1,543 AUD
Retailer 14$1,560 AUD
Retailer 6$1,586 AUD
Retailer 2$1,791 AUD
Retailer 17$2,117 AUD
Diamond Exchange Canada$2,248 AUD

19 data points across 18 retailers

11 retailers$1,051 AUD to $2,248 AUD

A
Cheapest Retailer
-
$1,051 AUD
B+
Retailer 2
-
$1,163 AUD
View
B+
Retailer 3
-
$1,249 AUD
View
B+
Retailer 4
-
$1,273 AUD
View
B+
Retailer 5
-
$1,431 AUD
View
B
Retailer 6
-
$1,543 AUD
View
B
Retailer 7
-
$1,543 AUD
View
B
Retailer 8
-
$1,560 AUD
View
B+
Retailer 9
-
$1,586 AUD
View
B
Retailer 10
-
$1,791 AUD
View
Most Expensive
B
Diamond Exchange Canada
1982807032 · Nov 5
$2,248 AUD
CA$2,185 CAD
View
10 more retailers have this diamond
Prices start from $1,051 AUDSave up to $1,196 AUD

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
$1,051 AUD