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Marquise|Natural|GIA

0.51ct J SI2 Marquise Natural Diamond

GD • J/SI2 • GIA 6565478488

Certificate GIA 6565478488

Diamond specifications and retailer prices

From $691 AUD
As of November 1, 2026
Save $154 AUD (18%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $845 AUD at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

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 SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6565478488. Listed at 3 retailers as of November 1, 2026, with prices from $691 to $845, a $154 spread on the same certified stone. 77 Diamonds lists it at $845. 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
J
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6565478488
Dimensions7.98 × 4.17 × 2.64 mm
L/W Ratio1.91
Culet sizeNone
Key to symbols
Cloud, Crystal
Top View
7.98 mm4.17 mm0.51 ctJ / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6565478488
Side View
Table 61.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 63.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $845 AUD|Low: $655 AUD|High: $853 AUD|Avg: $738 AUD|+8.8%
77 Diamonds
Retailer 2
Retailer 3
November 6, 2026
Retailer 2$691 AUD
Retailer 3$731 AUD
77 Diamonds$845 AUD

35 data points across 3 retailers

3 retailers$691 AUD to $845 AUD

B+
Cheapest Retailer
-
$691 AUD
B+
Retailer 2
-
$731 AUD
View
Most Expensive
B+
77 Diamonds
MQCP8QWCFDVD · Nov 6
$845 AUD
£457 GBP
View
2 more retailers have this diamond
Prices start from $691 AUDSave up to $154 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.

B+
0.51ct Marquise
$691 AUD