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Marquise|Natural|GIA

0.51ct J SI1 Marquise Natural Diamond

GD • J/SI1 • GIA 5556453982

Certificate GIA 5556453982

Diamond specifications and retailer prices

From $644 AUD
MYR 1,840 MYR
As of October 30, 2026
Save $213 AUD (25%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $858 AUD at Blue Nile · As of October 31, 2026
View at Blue Nile

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 5556453982. Listed at 5 retailers as of October 30, 2026, with prices from $644 to $858, a $213 spread on the same certified stone. Blue Nile lists it at $858. 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
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryGood
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5556453982
Dimensions8.00 × 4.18 × 2.65 mm
L/W Ratio1.91
Culet sizeNone
Key to symbols
Crystal, Twinning Wisp
Top View
8.00 mm4.18 mm0.51 ctJ / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryGood
FluorescenceMedium
CertificateGIA 5556453982
Side View
Table 62.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.4%

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: Oct 30
Current: $858 AUD|Low: $566 AUD|High: $906 AUD|Avg: $738 AUD|-5.4%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 2, 2026
Retailer 5$644 AUD
Retailer 3$662 AUD
Retailer 4$715 AUD
Retailer 2$832 AUD
Blue Nile$858 AUD

41 data points across 5 retailers

5 retailers$644 AUD to $858 AUD

A
Cheapest Retailer
-
$644 AUD
MYR 1,840 MYR
B+
Retailer 2
-
$662 AUD
$464 USD
View
Final sale: no returns
B+
Retailer 3
-
$715 AUD
SGD 677 SGD
View
B+
Retailer 4
-
$832 AUD
£459 GBP
View
Most Expensive
B+
Blue Nile
29346053 · Oct 31
$858 AUD
$601 USD
View
4 more retailers have this diamond
Prices start from $644 AUDSave up to $213 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
$644 AUD