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Marquise|Natural|GIA

0.66ct J SI2 Marquise Natural Diamond

GD • J/SI2 • GIA 5182025906

Shape and cutting style on the report: Marquise brilliant

Certificate GIA 5182025906

Diamond specifications and retailer prices

From £736 GBP
As of November 5, 2026
Save £78 GBP (10%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £814 GBP at Jared · As of November 6, 2026
View at Jared

About this 0.66ct natural marquise diamond

This 0.66ct 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 5182025906. Listed at 4 retailers as of November 5, 2026, with a relatively tight 11% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

0.66
Carat
J
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishGood
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5182025906
Dimensions8.71 × 4.76 × 2.82 mm
L/W Ratio1.83
Top View
8.71 mm4.76 mm0.66 ctJ / SI2
OriginNatural
CutGood
PolishGood
SymmetryGood
FluorescenceFaint
CertificateGIA 5182025906
Side View
Table 63.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 59.2%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £814 GBP|Low: £648 GBP|High: £827 GBP|Avg: £763 GBP|-0.9%
Jared
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
September 26, 2026
Retailer 5£648 GBP
Retailer 2£736 GBP
Retailer 4£741 GBP
Retailer 6£792 GBP
Retailer 7£792 GBP
Jared£814 GBP
Retailer 3£827 GBP

28 data points across 7 retailers

4 retailers£736 GBP to £814 GBP

B
Cheapest Retailer
-
£736 GBP
B
Retailer 2
-
£792 GBP
View
B
Retailer 3
-
£792 GBP
View
Most Expensive
C
Jared
150516936 · Nov 6
£814 GBP
$1,090 USD
View
3 more retailers have this diamond
Prices start from £736 GBPSave up to £78 GBP

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
0.66ct Marquise
£736 GBP