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Marquise|Natural|GIA

1.01ct I SI1 Marquise Natural Diamond

ID • I/SI1 • GIA 1559004511

Certificate GIA 1559004511

Diamond specifications and retailer prices

From £1,446 GBP
As of November 2, 2026
Save £2,171 GBP (60%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £3,616 GBP at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.01ct natural marquise diamond

This 1.01ct 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 1559004511. Listed at 8 retailers as of November 2, 2026, with prices from £1,446 to £3,616, a £2,171 spread on the same certified stone. NZ Jewellers lists it at £3,616. 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

1.01
Carat
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle42.17°
Pavilion angle40.84°
OriginNatural
Grading LabGIA
CertificateGIA 1559004511
Dimensions9.13 × 5.13 × 3.48 mm
L/W Ratio1.78
Girdle conditionVery Thick
Key to symbols
Crystal, Feather
Top View
9.13 mm5.13 mm1.01 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1559004511
Side View
Table 61.0%Crown 42.17°Girdle: Very ThickPavilion 40.84°Culet: NoneDepth 67.8%

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: Nov 2
Current: £3,616 GBP|Low: £1,446 GBP|High: £3,654 GBP|Avg: £1,977 GBP|+9.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 2£1,446 GBP
Retailer 7£1,482 GBP
Retailer 4£1,510 GBP
Retailer 5£1,551 GBP
Retailer 6£1,583 GBP
Retailer 9£1,603 GBP
Retailer 8£1,902 GBP
Retailer 3£2,597 GBP
NZ Jewellers£3,616 GBP

37 data points across 9 retailers

8 retailers£1,446 GBP to £3,616 GBP

A
Cheapest Retailer
-
£1,446 GBP
A
Retailer 2
-
£1,482 GBP
View
A
Retailer 3
-
£1,510 GBP
View
A
Retailer 4
-
£1,551 GBP
View
A
Retailer 5
-
£1,583 GBP
View
Retailer 6
-
£1,902 GBP
View
Price last confirmed 30 days ago
B+
Retailer 7
-
£2,597 GBP
View
Most Expensive
B
NZ Jewellers
52a5c3ca-3245-41f7-813a-018c244f3885 · Nov 3
£3,616 GBP
$4,850 USD
View
7 more retailers have this diamond
Prices start from £1,446 GBPSave up to £2,171 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
1.01ct Marquise
£1,446 GBP