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Marquise|Natural|GIA

1.00ct H SI1 Marquise Natural Diamond

ID • H/SI1 • GIA 6552949517

Certificate GIA 6552949517

Diamond specifications and retailer prices

From £1,540 GBP
As of November 4, 2026
Save £2,731 GBP (64%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £4,271 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 H 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 6552949517. Listed at 19 retailers as of November 4, 2026, with prices from £1,540 to £4,271, a £2,731 spread on the same certified stone. NZ Jewellers lists it at £4,271. 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
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6552949517
Dimensions9.28 × 5.14 × 3.42 mm
L/W Ratio1.81
Girdle conditionFaceted
Culet sizeNone
Top View
9.28 mm5.14 mm1.00 ctH / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6552949517
Side View
Table 56.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 66.6%

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: £1,980 GBP|Low: £1,540 GBP|High: £3,618 GBP|Avg: £2,097 GBP|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 8£1,540 GBP
Retailer 2£1,543 GBP
Retailer 9£1,698 GBP
Retailer 3£1,756 GBP
Retailer 5£1,864 GBP
Retailer 1£1,980 GBP
Retailer 4£2,183 GBP
Retailer 7£2,382 GBP
Retailer 6£3,570 GBP

24 data points across 9 retailers

19 retailers£1,540 GBP to £4,271 GBP

A
Cheapest Retailer
-
£1,540 GBP
A
Retailer 2
-
£1,543 GBP
View
Retailer 3
-
£1,698 GBP
View
Price last confirmed 10 days ago
A
Retailer 4
-
£1,756 GBP
View
A
Retailer 5
-
£1,864 GBP
View
B+
Retailer 6
-
£1,878 GBP
View
B+
Retailer 7
-
£1,886 GBP
View
Final sale: no returns
B+
Retailer 8
-
£1,980 GBP
View
B+
Retailer 9
-
£2,006 GBP
View
B+
Retailer 10
-
£2,032 GBP
View
B+
Retailer 11
-
£2,043 GBP
View
B+
Retailer 12
-
£2,122 GBP
View
Retailer 13
-
£2,136 GBP
View
Price last confirmed 9 days ago
B+
Retailer 14
-
£2,183 GBP
View
B+
Retailer 15
-
£2,358 GBP
View
B+
Retailer 16
-
£2,382 GBP
View
B
Retailer 17
-
£2,971 GBP
View
B
Retailer 18
-
£3,570 GBP
View
Most Expensive
B
NZ Jewellers
2b6969a7-c534-4c1d-9018-8465ec3ef127 · Nov 5
£4,271 GBP
$5,749 USD
View
18 more retailers have this diamond
Prices start from £1,540 GBPSave up to £2,731 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
£1,540 GBP