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Marquise|Natural|GIA

0.51ct J SI1 Marquise Natural Diamond

ID • J/SI1 • GIA 6335211635

Certificate GIA 6335211635

Diamond specifications and retailer prices

From $822 AUD
HK$4,500 HKD
As of November 1, 2026
Save $1,420 AUD (63%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $3,045 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 J 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 6335211635. Listed at 17 retailers as of November 1, 2026, with a 173% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6335211635
Dimensions6.92 × 4.43 × 2.69 mm
L/W Ratio1.56
Top View
6.92 mm4.43 mm0.51 ctJ / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6335211635
Side View
Table 60.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 60.7%

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 1
Current: $3,045 AUD|Low: $820 AUD|High: $3,045 AUD|Avg: $1,264 AUD
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
November 2, 2026
Retailer 7$822 AUD
Retailer 8$849 AUD
Retailer 6$870 AUD
Retailer 3$896 AUD
Retailer 15$970 AUD
Retailer 16$970 AUD
Retailer 14$1,009 AUD
Retailer 17$1,120 AUD
Retailer 4$1,140 AUD
Retailer 9$1,159 AUD
Retailer 10$1,188 AUD
Retailer 2$1,192 AUD
Retailer 5$1,234 AUD
Retailer 12$1,381 AUD
Retailer 13$1,499 AUD
Retailer 11$2,242 AUD
NZ Jewellers$3,045 AUD

26 data points across 17 retailers

17 retailers$822 AUD to $2,242 AUD

A
Cheapest Retailer
-
$822 AUD
HK$4,500 HKD
B+
Retailer 2
-
$870 AUD
$610 USD
View
B+
Retailer 3
-
$896 AUD
$628 USD
View
Final sale: no returns
B+
Retailer 4
-
$970 AUD
$680 USD
View
B+
Retailer 5
-
$970 AUD
$680 USD
View
B+
Retailer 6
-
$1,009 AUD
$707 USD
View
B+
Retailer 7
-
$1,009 AUD
SGD 956 SGD
View
B
Retailer 8
-
$1,120 AUD
$785 USD
View
B
Retailer 9
-
$1,140 AUD
$799 USD
View
B
Retailer 10
-
$1,159 AUD
$813 USD
View
B
Retailer 11
-
$1,188 AUD
£656 GBP
View
B+
Retailer 12
-
$1,192 AUD
£658 GBP
View
B
Retailer 13
-
$1,234 AUD
$865 USD
View
B
Retailer 14
-
$1,381 AUD
€922 EUR
View
B
Retailer 15
-
$1,499 AUD
ZAR 16,968 ZAR
View
B
Retailer 16
-
$2,242 AUD
£1,237 GBP
View
Most Expensive
NZ Jewellers
8cb642c9-93eb-4818-901d-5b6b7c670ec0 · Oct 30
$3,045 AUD
$2,134 USD
View
Price under review
16 more retailers have this diamond
Prices start from $822 AUDSave up to $1,420 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
$822 AUD