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Marquise|Natural|GIA

1.00ct M SI1 Marquise Natural Diamond

ID • M/SI1 • GIA 5533931697

Certificate GIA 5533931697

Diamond specifications and retailer prices

From £687 GBP
As of October 31, 2026
Save £430 GBP (38%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,117 GBP at Cape Diamonds · As of November 5, 2026
View at Cape Diamonds

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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5533931697. Listed at 5 retailers as of October 31, 2026, with prices from £687 to £1,117, a £430 spread on the same certified stone. Cape Diamonds lists it at £1,117. 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

1.00
Carat
M
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5533931697
Dimensions9.84 × 5.50 × 3.24 mm
L/W Ratio1.79
Top View
9.84 mm5.50 mm1.00 ctM / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5533931697
Side View
Table 57.0%CrownGirdle: UNDPavilionCulet: NoneDepth 58.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £1,117 GBP|Low: £686 GBP|High: £1,163 GBP|Avg: £920 GBP|-2.6%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 3£687 GBP
Retailer 5£877 GBP
Retailer 2£900 GBP
Retailer 4£1,007 GBP
Cape Diamonds£1,117 GBP

46 data points across 5 retailers

5 retailers£687 GBP to £1,117 GBP

A
Cheapest Retailer
-
£687 GBP
B+
Retailer 2
-
£877 GBP
View
A
Retailer 3
-
£900 GBP
View
B+
Retailer 4
-
£1,007 GBP
View
Most Expensive
B+
Cape Diamonds
cert_5533931697 · Nov 5
£1,117 GBP
ZAR 24,294 ZAR
View
4 more retailers have this diamond
Prices start from £687 GBPSave up to £430 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.

A
1.00ct Marquise
£687 GBP