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Marquise|Natural|GIA

1.00ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 1555023523

Certificate GIA 1555023523

Diamond specifications and retailer prices

From £2,092 GBP
As of November 4, 2026
Save £2,485 GBP (54%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £5,116 GBP at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555023523. Listed at 25 retailers as of November 4, 2026, with a 119% 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

1.00
Carat
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1555023523
Dimensions9.87 × 5.19 × 3.24 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Cavity, Needle, Indented Natural, Natural
Top View
9.87 mm5.19 mm1.00 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1555023523
Side View
Table 62.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 62.4%

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 4
Current: £2,662 GBP|Low: £2,092 GBP|High: £4,639 GBP|Avg: £3,062 GBP|-1.8%
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
November 6, 2026
Retailer 13£2,092 GBP
Retailer 8£2,175 GBP
Retailer 9£2,450 GBP
Retailer 5£2,482 GBP
Retailer 2£2,556 GBP
Retailer 1£2,662 GBP
Retailer 4£2,745 GBP
Retailer 6£2,823 GBP
Retailer 12£2,850 GBP
Retailer 11£3,200 GBP
Retailer 7£3,350 GBP
Retailer 3£4,251 GBP
Retailer 10£4,577 GBP

24 data points across 13 retailers

25 retailers£2,092 GBP to £4,577 GBP

A
Cheapest Retailer
-
£2,092 GBP
A
Retailer 2
-
£2,175 GBP
View
A
Retailer 3
-
£2,450 GBP
View
A
Retailer 4
-
£2,476 GBP
View
A
Retailer 5
-
£2,482 GBP
View
A
Retailer 6
-
£2,533 GBP
View
Final sale: no returns
A
Retailer 7
-
£2,556 GBP
View
B+
Retailer 8
-
£2,556 GBP
View
B+
Retailer 9
-
£2,637 GBP
View
A
Retailer 10
-
£2,662 GBP
View
Retailer 11
-
£2,745 GBP
View
Price last confirmed 8 days ago
Retailer 12
-
£2,745 GBP
View
Price last confirmed 21 days ago
B+
Retailer 13
-
£2,823 GBP
View
B+
Retailer 14
-
£2,850 GBP
View
B+
Retailer 15
-
£2,852 GBP
View
B+
Retailer 16
-
£2,853 GBP
View
B+
Retailer 17
-
£2,890 GBP
View
Retailer 18
-
£2,937 GBP
View
Price last confirmed 38 days ago
Retailer 19
-
£2,982 GBP
View
Price last confirmed 29 days ago
B+
Retailer 20
-
£3,200 GBP
View
B+
Retailer 21
-
£3,350 GBP
View
Retailer 22
-
£3,389 GBP
View
Price last confirmed 38 days ago
Retailer 23
-
£4,251 GBP
View
Price last confirmed 9 days ago
B
Retailer 24
-
£4,577 GBP
View
Most Expensive
NZ Jewellers
59feb36f-121a-4f76-9f73-37702296f960 · Sep 29
£5,116 GBP
$6,886 USD
View
Price last confirmed 37 days ago
24 more retailers have this diamond
Prices start from £2,092 GBPSave up to £2,485 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
£2,092 GBP