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Marquise|Natural|GIA

0.51ct F SI2 Marquise Natural Diamond

VG • F/SI2 • GIA 6565139545

Certificate GIA 6565139545

Diamond specifications and retailer prices

From $870 AUD
As of November 6, 2026
Save $618 AUD (42%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,488 AUD at Frank Darling · As of November 6, 2026
View at Frank Darling

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6565139545. Listed at 8 retailers as of November 6, 2026, with prices from $870 to $1,488, a $618 spread on the same certified stone. Frank Darling lists it at $1,488. 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
F
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6565139545
Dimensions7.85 × 4.13 × 2.58 mm
L/W Ratio1.90
Culet sizeNone
Top View
7.85 mm4.13 mm0.51 ctF / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 6565139545
Side View
Table 60.0%CrownGirdle: VTN-VTKPavilionCulet: NoneDepth 62.5%

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 6
Current: $1,488 AUD|Low: $870 AUD|High: $1,505 AUD|Avg: $1,137 AUD|-1.1%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8$870 AUD
Retailer 6$895 AUD
Retailer 9$895 AUD
Retailer 5$1,022 AUD
Retailer 7$1,131 AUD
Retailer 3$1,217 AUD
Retailer 2$1,276 AUD
Retailer 4$1,304 AUD
Frank Darling$1,488 AUD

25 data points across 9 retailers

8 retailers$870 AUD to $1,488 AUD

A
Cheapest Retailer
-
$870 AUD
Retailer 2
-
$895 AUD
View
Price last confirmed 20 days ago
A
Retailer 3
-
$1,022 AUD
View
B+
Retailer 4
-
$1,131 AUD
View
B+
Retailer 5
-
$1,217 AUD
View
B+
Retailer 6
-
$1,276 AUD
View
B+
Retailer 7
-
$1,304 AUD
View
Most Expensive
B
Frank Darling
2679411HK · Nov 6
$1,488 AUD
$1,022 USD
View
7 more retailers have this diamond
Prices start from $870 AUDSave up to $618 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
$870 AUD