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Marquise|Natural|GIA

0.78ct J SI2 Marquise Natural Diamond

EX • J/SI2 • GIA 5556669780

Certificate GIA 5556669780

Diamond specifications and retailer prices

From $1,637 AUD
$1,147 USD
As of November 2, 2026
1 retailer carries this diamond
Only listing: $1,637 AUD at The Diamond Guys
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at The Diamond Guys

About this 0.78ct natural marquise diamond

This 0.78ct natural marquise sits in the just-under-one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5556669780. Listed at a single retailer as of November 2, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

0.78
Carat
J
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.73°
Pavilion angle39.04°
OriginNatural
Grading LabGIA
CertificateGIA 5556669780
Dimensions9.23 × 4.78 × 2.96 mm
L/W Ratio1.93
Culet sizeNone
Top View
9.23 mm4.78 mm0.78 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5556669780
Side View
Table 59.0%Crown 38.73°Girdle: STK-VTKPavilion 39.04°Culet: NoneDepth 62.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 2
Current: $1,292 AUD|Low: $866 AUD|High: $2,145 AUD|Avg: $1,581 AUD|-3.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
The Diamond Guys
September 4, 2026
Retailer 11$866 AUD
Retailer 6$1,178 AUD
Retailer 4$1,221 AUD
Retailer 7$1,284 AUD
Retailer 1$1,292 AUD
Retailer 9$1,360 AUD
Retailer 5$1,478 AUD
The Diamond Guys$1,637 AUD
Retailer 10$1,762 AUD
Retailer 8$1,871 AUD
Retailer 3$2,130 AUD
Retailer 2$2,143 AUD

31 data points across 12 retailers

1 retailer

B+
The Diamond Guys
1964687527 · Nov 2
$1,637 AUD
$1,147 USD
View

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+
0.78ct Marquise
$1,637 AUD