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Marquise|Natural|GIA

1.00ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 6551185021

Certificate GIA 6551185021

Diamond specifications and retailer prices

From £2,846 GBP
As of November 5, 2026
Save £3,500 GBP (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £6,347 GBP at NZ Jewellers · As of November 5, 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 6551185021. Listed at 21 retailers as of November 5, 2026, with prices from £2,846 to £6,347, a £3,500 spread on the same certified stone. NZ Jewellers lists it at £6,347. 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
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6551185021
Dimensions10.31 × 5.06 × 3.18 mm
L/W Ratio2.04
Girdle conditionFaceted
Culet sizeNone
Top View
10.31 mm5.06 mm1.00 ctE / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6551185021
Side View
Table 56.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 62.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £6,347 GBP|Low: £2,904 GBP|High: £6,347 GBP|Avg: £3,963 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
November 6, 2026
Retailer 9£2,904 GBP
Retailer 12£3,100 GBP
Retailer 4£3,115 GBP
Retailer 11£3,128 GBP
Retailer 3£3,300 GBP
Retailer 13£3,300 GBP
Retailer 2£3,565 GBP
Retailer 5£3,595 GBP
Retailer 10£3,672 GBP
Retailer 8£4,105 GBP
Retailer 6£4,445 GBP
Retailer 7£5,786 GBP
NZ Jewellers£6,347 GBP

46 data points across 13 retailers

21 retailers£2,846 GBP to £6,347 GBP

B+
Cheapest Retailer
-
£2,846 GBP
B+
Retailer 2
-
£2,904 GBP
View
B+
Retailer 3
-
£3,012 GBP
View
B+
Retailer 4
-
£3,100 GBP
View
B+
Retailer 5
-
£3,115 GBP
View
B+
Retailer 6
-
£3,128 GBP
View
Retailer 7
-
£3,300 GBP
View
Price last confirmed 8 days ago
B
Retailer 8
-
£3,300 GBP
View
B
Retailer 9
-
£3,300 GBP
View
B+
Retailer 10
-
£3,565 GBP
View
B
Retailer 11
-
£3,595 GBP
View
Retailer 12
-
£3,672 GBP
View
Price last confirmed 28 days ago
B
Retailer 13
-
£3,708 GBP
View
B
Retailer 14
-
£3,708 GBP
View
B
Retailer 15
-
£3,808 GBP
View
B
Retailer 16
-
£3,834 GBP
View
Retailer 17
-
£4,023 GBP
View
Price last confirmed 14 days ago
B
Retailer 18
-
£4,105 GBP
View
B
Retailer 19
-
£4,445 GBP
View
B
Retailer 20
-
£5,786 GBP
View
Most Expensive
B
NZ Jewellers
f3e8fe6d-4665-4962-b68a-9e5acc960959 · Nov 5
£6,347 GBP
$8,542 USD
View
20 more retailers have this diamond
Prices start from £2,846 GBPSave up to £3,500 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
£2,846 GBP