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Marquise|Natural|GIA

1.00ct M SI1 Marquise Natural Diamond

VG • M/SI1 • GIA 6551617543

Certificate GIA 6551617543

Diamond specifications and retailer prices

From £484 GBP
As of November 6, 2026
Save £453 GBP (48%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £938 GBP at Yorxs · As of November 3, 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 SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6551617543. Listed at 9 retailers as of November 3, 2026, with prices from £484 to £938, a £453 spread on the same certified stone. Yorxs lists it at £938. 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
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551617543
Dimensions9.29 × 5.14 × 3.30 mm
L/W Ratio1.81
Top View
9.29 mm5.14 mm1.00 ctM / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 6551617543
Side View
Table 70.0%CrownGirdlePavilionCuletDepth 64.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £637 GBP|Low: £484 GBP|High: £1,124 GBP|Avg: £769 GBP|-10.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Yorxs
November 6, 2026
Retailer 6£484 GBP
Retailer 1£637 GBP
Retailer 5£657 GBP
Retailer 8£689 GBP
Retailer 2£747 GBP
Retailer 7£747 GBP
Retailer 3£769 GBP
Retailer 4£791 GBP
Yorxs£938 GBP

35 data points across 9 retailers

9 retailers£484 GBP to £938 GBP

B+
Cheapest Retailer
-
£484 GBP
B+
Retailer 2
-
£637 GBP
View
B+
Retailer 3
-
£657 GBP
View
B+
Retailer 4
-
£747 GBP
View
B+
Retailer 5
-
£747 GBP
View
B+
Retailer 6
-
£769 GBP
View
B+
Retailer 7
-
£791 GBP
View
Retailer 8
-
£911 GBP
View
Price last confirmed 60 days ago
Most Expensive
B+
Yorxs
85E9AFC87 · Nov 3
£938 GBP
€1,202 EUR
View
8 more retailers have this diamond
Prices start from £484 GBPSave up to £453 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
£484 GBP