CaratHunter
Plans
Marquise|Natural|GIA

0.78ct J SI2 Marquise Natural Diamond

EX • J/SI2 • GIA 5556669780

Certificate GIA 5556669780

Diamond specifications and retailer prices

From £855 GBP
$1,147 USD
As of November 2, 2026
1 retailer carries this diamond
Only listing: £855 GBP 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £675 GBP|Low: £452 GBP|High: £1,120 GBP|Avg: £826 GBP|-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£452 GBP
Retailer 6£615 GBP
Retailer 4£637 GBP
Retailer 7£671 GBP
Retailer 1£675 GBP
Retailer 9£710 GBP
Retailer 5£772 GBP
The Diamond Guys£855 GBP
Retailer 10£920 GBP
Retailer 8£977 GBP
Retailer 3£1,113 GBP
Retailer 2£1,119 GBP

31 data points across 12 retailers

1 retailer

B+
The Diamond Guys
1964687527 · Nov 2
£855 GBP
$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
£855 GBP