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Marquise|Natural|GIA

1.00ct M SI2 Marquise Natural Diamond

M/SI2 • GIA 6541431070

Certificate GIA 6541431070

Diamond specifications and retailer prices

From £666 GBP
As of November 4, 2026
Save £298 GBP (31%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £964 GBP at Yorxs · As of November 6, 2026
View at Yorxs

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included) and certified by GIA 6541431070. Listed at 2 retailers as of November 4, 2026, with prices from £666 to £964, a £298 spread on the same certified stone. Yorxs lists it at £964. 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

1.00
Carat
M
Colour
SI2
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6541431070
Dimensions10.26 × 5.12 × 3.16 mm
L/W Ratio2.00
Key to symbols
Crystal, Feather, Needle
Top View
10.26 mm5.12 mm1.00 ctM / SI2
OriginNatural
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6541431070
Side View
Table 55.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 61.7%

Caratlytics Score

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

Last verified: Nov 4
Current: £666 GBP|Low: £594 GBP|High: £1,094 GBP|Avg: £833 GBP|+3.6%
Retailer 1
Yorxs
November 6, 2026
Retailer 1£666 GBP
Yorxs£964 GBP

20 data points across 2 retailers

2 retailers£666 GBP to £964 GBP

B+
Cheapest Retailer
-
£666 GBP
Final sale: no returns
Most Expensive
B+
Yorxs
570940620 · Nov 6
£964 GBP
€1,236 EUR
View
1 more retailer has this diamond
Prices start from £666 GBPSave up to £298 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+
1.00ct Marquise
£666 GBP