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Marquise|Natural|GIA

0.51ct E SI2 Marquise Natural Diamond

GD • E/SI2 • GIA 6515228594

Certificate GIA 6515228594

Diamond specifications and retailer prices

From $1,329 AUD
As of November 1, 2026
Save $1,584 AUD (54%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $3,891 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 6515228594. Listed at 18 retailers as of November 1, 2026, with a 119% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
E
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6515228594
Dimensions8.63 × 4.00 × 2.54 mm
L/W Ratio2.16
Top View
8.63 mm4.00 mm0.51 ctE / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6515228594
Side View
Table 58.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 63.4%

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 1
Current: $2,057 AUD|Low: $1,111 AUD|High: $2,957 AUD|Avg: $1,805 AUD|+2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4$1,329 AUD
Retailer 5$1,334 AUD
Retailer 6$1,419 AUD
Retailer 2$1,800 AUD
Retailer 1$2,057 AUD
Retailer 3$2,913 AUD

44 data points across 6 retailers

18 retailers$1,329 AUD to $2,913 AUD

B+
Cheapest Retailer
-
$1,329 AUD
B+
Retailer 2
-
$1,334 AUD
View
Final sale: no returns
B
Retailer 3
-
$1,413 AUD
View
B
Retailer 4
-
$1,413 AUD
View
B
Retailer 5
-
$1,419 AUD
View
Retailer 6
-
$1,446 AUD
View
Price last confirmed 8 days ago
B
Retailer 7
-
$1,446 AUD
View
B
Retailer 8
-
$1,501 AUD
View
B
Retailer 9
-
$1,667 AUD
View
B
Retailer 10
-
$1,757 AUD
View
B
Retailer 11
-
$1,757 AUD
View
B
Retailer 12
-
$1,798 AUD
View
B
Retailer 13
-
$1,800 AUD
View
B
Retailer 14
-
$1,814 AUD
View
B
Retailer 15
-
$2,057 AUD
View
C
Retailer 16
-
$2,590 AUD
View
B
Retailer 17
-
$2,913 AUD
View
Most Expensive
NZ Jewellers
029c039f-5a5a-4872-8f70-5be64ca9e69e · Nov 5
$3,891 AUD
$2,724 USD
View
Price under review
17 more retailers have this diamond
Prices start from $1,329 AUDSave up to $1,584 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.

B+
0.51ct Marquise
$1,329 AUD