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Marquise|Natural|GIA

1.00ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 6541818171

Certificate GIA 6541818171

Diamond specifications and retailer prices

From £2,216 GBP
As of November 2, 2026
Save £2,345 GBP (51%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £4,561 GBP at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6541818171. Listed at 16 retailers as of November 2, 2026, with prices from £2,216 to £4,561, a £2,345 spread on the same certified stone. NZ Jewellers lists it at £4,561. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6541818171
Dimensions9.77 × 5.26 × 3.19 mm
L/W Ratio1.86
Top View
9.77 mm5.26 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6541818171
Side View
Table 60.0%CrownGirdle: THK-XTKPavilionCulet: NoneDepth 60.6%

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: £4,561 GBP|Low: £2,208 GBP|High: £4,561 GBP|Avg: £2,885 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 4, 2026
Retailer 7£2,216 GBP
Retailer 12£2,372 GBP
Retailer 15£2,372 GBP
Retailer 14£2,463 GBP
Retailer 6£2,551 GBP
Retailer 4£2,692 GBP
Retailer 5£2,692 GBP
Retailer 2£2,709 GBP
Retailer 13£2,737 GBP
Retailer 3£2,781 GBP
Retailer 16£2,807 GBP
Retailer 9£2,877 GBP
Retailer 8£2,966 GBP
Retailer 11£3,218 GBP
Retailer 10£4,378 GBP
NZ Jewellers£4,561 GBP

43 data points across 16 retailers

16 retailers£2,216 GBP to £4,561 GBP

B+
Cheapest Retailer
-
£2,216 GBP
B+
Retailer 2
-
£2,372 GBP
View
B+
Retailer 3
-
£2,372 GBP
View
B+
Retailer 4
-
£2,463 GBP
View
B
Retailer 5
-
£2,551 GBP
View
B+
Retailer 6
-
£2,692 GBP
View
B+
Retailer 7
-
£2,692 GBP
View
B+
Retailer 8
-
£2,709 GBP
View
B
Retailer 9
-
£2,737 GBP
View
B
Retailer 10
-
£2,781 GBP
View
Retailer 11
-
£2,807 GBP
View
Price last confirmed 31 days ago
B
Retailer 12
-
£2,877 GBP
View
Retailer 13
-
£2,966 GBP
View
Price last confirmed 12 days ago
B
Retailer 14
-
£3,218 GBP
View
B
Retailer 15
-
£4,378 GBP
View
Most Expensive
B
NZ Jewellers
8949f649-d9ed-47ef-bd18-7dc83a964ae4 · Nov 3
£4,561 GBP
$6,117 USD
View
15 more retailers have this diamond
Prices start from £2,216 GBPSave up to £2,345 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
£2,216 GBP