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Marquise|Natural|GIA

0.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 6562612974

Certificate GIA 6562612974

Diamond specifications and retailer prices

From $649 AUD
$455 USD
As of November 2, 2026
Save $2,048 AUD (76%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,697 AUD at NZ Jewellers · As of November 3, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6562612974. Listed at 14 retailers as of November 2, 2026, with prices from $649 to $2,697, a $2,048 spread on the same certified stone. NZ Jewellers lists it at $2,697. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6562612974
Dimensions8.00 × 4.23 × 2.67 mm
L/W Ratio1.89
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal
Top View
8.00 mm4.23 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6562612974
Side View
Table 57.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 63.0%

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 2
Current: $2,697 AUD|Low: $649 AUD|High: $2,757 AUD|Avg: $1,023 AUD|+17.1%
NZ Jewellers
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
November 3, 2026
Retailer 11$649 AUD
Retailer 13$703 AUD
Retailer 12$728 AUD
Retailer 7$758 AUD
Retailer 6$775 AUD
Retailer 5$781 AUD
Retailer 9$812 AUD
Retailer 14$812 AUD
Retailer 3$820 AUD
Retailer 10$864 AUD
Retailer 2$880 AUD
Retailer 4$970 AUD
Retailer 8$1,626 AUD
NZ Jewellers$2,697 AUD

14 data points across 14 retailers

14 retailers$649 AUD to $2,697 AUD

A
Cheapest Retailer
-
$649 AUD
$455 USD
Final sale: no returns
A
Retailer 2
-
$703 AUD
$493 USD
View
A
Retailer 3
-
$728 AUD
$510 USD
View
A
Retailer 4
-
$758 AUD
$531 USD
View
A
Retailer 5
-
$775 AUD
$543 USD
View
A
Retailer 6
-
$781 AUD
SGD 740 SGD
View
A
Retailer 7
-
$812 AUD
$569 USD
View
A
Retailer 8
-
$812 AUD
$569 USD
View
A
Retailer 9
-
$820 AUD
$575 USD
View
A
Retailer 10
-
$864 AUD
£477 GBP
View
A
Retailer 11
-
$880 AUD
£485 GBP
View
B+
Retailer 12
-
$970 AUD
$680 USD
View
B
Retailer 13
-
$1,626 AUD
£897 GBP
View
Most Expensive
C
NZ Jewellers
0b52d66a-7e99-4f9c-a014-51de6eea188d · Nov 3
$2,697 AUD
$1,890 USD
View
13 more retailers have this diamond
Prices start from $649 AUDSave up to $2,048 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
$649 AUD