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Marquise|Natural|GIA

1.01ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 5241001887

Certificate GIA 5241001887

Diamond specifications and retailer prices

From £1,828 GBP
As of November 3, 2026
Save £2,376 GBP (57%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £4,380 GBP at NZ Jewellers · As of September 30, 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 5241001887. Listed at 21 retailers as of November 2, 2026, with a 130% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5241001887
Dimensions10.43 × 5.23 × 3.29 mm
L/W Ratio1.99
Girdle conditionFaceted
Top View
10.43 mm5.23 mm1.01 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5241001887
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 62.9%

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 3
Current: £2,399 GBP|Low: £1,815 GBP|High: £4,311 GBP|Avg: £2,599 GBP|-0.9%
Retailer 1
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
Retailer 17
November 4, 2026
Retailer 6£1,828 GBP
Retailer 17£1,890 GBP
Retailer 8£1,960 GBP
Retailer 9£1,995 GBP
Retailer 11£2,024 GBP
Retailer 5£2,102 GBP
Retailer 14£2,218 GBP
Retailer 3£2,305 GBP
Retailer 1£2,399 GBP
Retailer 10£2,561 GBP
Retailer 16£2,583 GBP
Retailer 13£2,774 GBP
Retailer 4£2,942 GBP
Retailer 7£3,079 GBP
Retailer 2£3,490 GBP
Retailer 12£3,751 GBP
Retailer 15£4,204 GBP

22 data points across 17 retailers

21 retailers£1,828 GBP to £4,204 GBP

A
Cheapest Retailer
-
£1,828 GBP
A
Retailer 2
-
£1,890 GBP
View
A
Retailer 3
-
£1,960 GBP
View
Retailer 4
-
£1,995 GBP
View
Price last confirmed 17 days ago
A
Retailer 5
-
£2,024 GBP
View
B+
Retailer 6
-
£2,102 GBP
View
Final sale: no returns
B+
Retailer 7
-
£2,218 GBP
View
B+
Retailer 8
-
£2,305 GBP
View
B+
Retailer 9
-
£2,399 GBP
View
B
Retailer 10
-
£2,561 GBP
View
B+
Retailer 11
-
£2,583 GBP
View
Retailer 12
-
£2,627 GBP
View
Price last confirmed 34 days ago
Retailer 13
-
£2,744 GBP
View
Price last confirmed 34 days ago
Retailer 14
-
£2,745 GBP
View
Price last confirmed 31 days ago
B+
Retailer 15
-
£2,774 GBP
View
B+
Retailer 16
-
£2,942 GBP
View
B
Retailer 17
-
£3,079 GBP
View
B
Retailer 18
-
£3,490 GBP
View
B
Retailer 19
-
£3,751 GBP
View
B
Retailer 20
-
£4,204 GBP
View
Most Expensive
NZ Jewellers
87d6c22a-7b30-4b9f-8ec4-7910d1580ad3 · Sep 30
£4,380 GBP
$5,874 USD
View
Price last confirmed 34 days ago
20 more retailers have this diamond
Prices start from £1,828 GBPSave up to £2,376 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
£1,828 GBP