Marquise|Natural|GIA

0.51ct E SI2 Marquise Natural Diamond

EX • E/SI2 • GIA 6545321237

Certificate GIA 6545321237

Diamond specifications and retailer prices

From $736 USD
As of November 5, 2026
Save $837 USD (53%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,573 USD 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 $736 to $1,573, a $837 spread on the same certified stone. Diamond Exchange Canada lists it at $1,573. 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
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $1,573 USD|Low: $512 USD|High: $1,573 USD|Avg: $1,009 USD
Diamond Exchange Canada
Retailer 2
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Retailer 12
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Retailer 18
November 6, 2026
Retailer 10$512 USD
Retailer 11$736 USD
Retailer 15$814 USD
Retailer 8$853 USD
Retailer 5$865 USD
Retailer 3$874 USD
Retailer 13$891 USD
Retailer 18$891 USD
Retailer 9$925 USD
Retailer 12$1,002 USD
Retailer 16$1,066 USD
Retailer 4$1,080 USD
Retailer 7$1,080 USD
Retailer 14$1,092 USD
Retailer 6$1,110 USD
Retailer 2$1,254 USD
Retailer 17$1,482 USD
Diamond Exchange Canada$1,573 USD

19 data points across 18 retailers

11 retailers$736 USD to $1,573 USD

A
Cheapest Retailer
-
$736 USD
B+
Retailer 2
-
$814 USD
View
B+
Retailer 3
-
$874 USD
View
B+
Retailer 4
-
$891 USD
View
B+
Retailer 5
-
$1,002 USD
View
B
Retailer 6
-
$1,080 USD
View
B
Retailer 7
-
$1,080 USD
View
B
Retailer 8
-
$1,092 USD
View
B+
Retailer 9
-
$1,110 USD
View
B
Retailer 10
-
$1,254 USD
View
Most Expensive
B
Diamond Exchange Canada
1982807032 · Nov 5
$1,573 USD
CA$2,185 CAD
View
10 more retailers have this diamond
Prices start from $736 USDSave up to $837 USD

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
$736 USD