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Marquise|Natural|GIA

0.51ct G SI2 Marquise Natural Diamond

VG • G/SI2 • GIA 6552497564

Certificate GIA 6552497564

Diamond specifications and retailer prices

From $808 AUD
$566 USD
As of November 2, 2026
Save $2,220 AUD (73%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $3,028 AUD at NZ Jewellers · As of October 30, 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 G colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6552497564. Listed at 21 retailers as of October 30, 2026, with prices from $808 to $3,028, a $2,220 spread on the same certified stone. NZ Jewellers lists it at $3,028. 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
G
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.6°
Pavilion angle41.5°
OriginNatural
Grading LabGIA
CertificateGIA 6552497564
Dimensions7.97 × 4.23 × 2.69 mm
L/W Ratio1.88
Girdle conditionFaceted
Top View
7.97 mm4.23 mm0.51 ctG / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6552497564
Side View
Table 61.0%Crown 36.6°Girdle: MED-THKPavilion 41.5°Culet: NDepth 63.6%

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: $3,028 AUD|Low: $693 AUD|High: $3,118 AUD|Avg: $1,183 AUD|-2.9%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 2, 2026
Retailer 10$808 AUD
Retailer 15$828 AUD
Retailer 7$875 AUD
Retailer 11$877 AUD
Retailer 9$942 AUD
Retailer 12$942 AUD
Retailer 14$965 AUD
Retailer 17$980 AUD
Retailer 6$990 AUD
Retailer 4$1,009 AUD
Retailer 8$1,020 AUD
Retailer 5$1,070 AUD
Retailer 19$1,070 AUD
Retailer 20$1,113 AUD
Retailer 2$1,153 AUD
Retailer 13$1,181 AUD
Retailer 3$1,239 AUD
Retailer 18$1,293 AUD
Retailer 16$2,229 AUD
NZ Jewellers$3,028 AUD

29 data points across 20 retailers

21 retailers$808 AUD to $3,028 AUD

A
Cheapest Retailer
-
$808 AUD
$566 USD
Final sale: no returns
A
Retailer 2
-
$828 AUD
$580 USD
View
A
Retailer 3
-
$875 AUD
$613 USD
View
B+
Retailer 4
-
$877 AUD
HK$4,800 HKD
View
A
Retailer 5
-
$942 AUD
$660 USD
View
A
Retailer 6
-
$942 AUD
$660 USD
View
A
Retailer 7
-
$965 AUD
$676 USD
View
A
Retailer 8
-
$980 AUD
$687 USD
View
A
Retailer 9
-
$990 AUD
$694 USD
View
B+
Retailer 10
-
$1,009 AUD
$707 USD
View
A
Retailer 11
-
$1,020 AUD
$715 USD
View
B+
Retailer 12
-
$1,070 AUD
$750 USD
View
B+
Retailer 13
-
$1,070 AUD
$750 USD
View
B+
Retailer 14
-
$1,113 AUD
$780 USD
View
B+
Retailer 15
-
$1,153 AUD
£636 GBP
View
B+
Retailer 16
-
$1,181 AUD
£652 GBP
View
B+
Retailer 17
-
$1,239 AUD
$868 USD
View
Retailer 18
-
$1,288 AUD
£711 GBP
View
Price last confirmed 36 days ago
B+
Retailer 19
-
$1,293 AUD
€863 EUR
View
B
Retailer 20
-
$2,229 AUD
£1,230 GBP
View
Most Expensive
B
NZ Jewellers
76c2553c-4cf3-400f-8ed5-5859e1cdf99e · Oct 30
$3,028 AUD
$2,122 USD
View
20 more retailers have this diamond
Prices start from $808 AUDSave up to $2,220 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
$808 AUD