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Marquise|Natural|GIA

0.51ct I IF Marquise Natural Diamond

EX • I/IF • GIA 6542938952

Certificate GIA 6542938952

Diamond specifications and retailer prices

From $819 AUD
As of November 6, 2026
Save $1,442 AUD (64%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $3,687 AUD at NZ Jewellers · As of September 25, 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 I colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542938952. Listed at 19 retailers as of November 6, 2026, with a 176% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.51
Carat
I
Colour
IF
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Pavilion angle39.6°
OriginNatural
Grading LabGIA
CertificateGIA 6542938952
Dimensions7.62 × 4.10 × 2.69 mm
L/W Ratio1.86
Top View
7.62 mm4.10 mm0.51 ctI / IF
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6542938952
Side View
Table 60.0%CrownGirdle: STK-VTKPavilion 39.6°Culet: NoneDepth 65.6%

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 6
Current: $1,633 AUD|Low: $819 AUD|High: $2,305 AUD|Avg: $1,424 AUD|-2.9%
Retailer 1
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
November 6, 2026
Retailer 3$819 AUD
Retailer 5$1,033 AUD
Retailer 6$1,042 AUD
Retailer 9$1,089 AUD
Retailer 10$1,141 AUD
Retailer 7$1,158 AUD
Retailer 12$1,176 AUD
Retailer 8$1,383 AUD
Retailer 16$1,383 AUD
Retailer 13$1,415 AUD
Retailer 11$1,503 AUD
Retailer 4$1,531 AUD
Retailer 1$1,633 AUD
Retailer 14$1,744 AUD
Retailer 2$2,070 AUD
Retailer 15$2,262 AUD

29 data points across 16 retailers

19 retailers$819 AUD to $2,262 AUD

A
Cheapest Retailer
-
$819 AUD
A
Retailer 2
-
$1,033 AUD
View
A
Retailer 3
-
$1,042 AUD
View
Final sale: no returns
A
Retailer 4
-
$1,089 AUD
View
A
Retailer 5
-
$1,141 AUD
View
Retailer 6
-
$1,158 AUD
View
Price last confirmed 8 days ago
A
Retailer 7
-
$1,176 AUD
View
A
Retailer 8
-
$1,383 AUD
View
A
Retailer 9
-
$1,383 AUD
View
B+
Retailer 10
-
$1,415 AUD
View
B+
Retailer 11
-
$1,503 AUD
View
B+
Retailer 12
-
$1,531 AUD
View
B+
Retailer 13
-
$1,586 AUD
View
B+
Retailer 14
-
$1,633 AUD
View
B+
Retailer 15
-
$1,744 AUD
View
Retailer 16
-
$1,749 AUD
View
Price last confirmed 33 days ago
B+
Retailer 17
-
$2,070 AUD
View
B
Retailer 18
-
$2,262 AUD
View
Most Expensive
NZ Jewellers
9f9df035-b8c5-4539-99ae-50f8749fb01b · Sep 25
$3,687 AUD
$2,533 USD
View
Price last confirmed 42 days ago
18 more retailers have this diamond
Prices start from $819 AUDSave up to $1,442 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
$819 AUD