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Marquise|Natural|GIA

1.00ct H SI2 Marquise Natural Diamond

GD • H/SI2 • GIA 2554040159

Certificate GIA 2554040159

Diamond specifications and retailer prices

From £1,948 GBP
As of November 5, 2026
Save £2,236 GBP (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,185 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 SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2554040159. Listed at 15 retailers as of November 5, 2026, with prices from £1,948 to £4,185, a £2,236 spread on the same certified stone. NZ Jewellers lists it at £4,185. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
H
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2554040159
Dimensions10.02 × 5.22 × 3.24 mm
L/W Ratio1.92
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
10.02 mm5.22 mm1.00 ctH / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554040159
Side View
Table 60.0%CrownGirdlePavilionCulet: NDepth 62.0%

Caratlytics Score

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

Price History

Last verified: Nov 5
Current: £4,185 GBP|Low: £1,948 GBP|High: £4,185 GBP|Avg: £2,570 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
November 6, 2026
Retailer 4£1,948 GBP
Retailer 12£2,008 GBP
Retailer 3£2,043 GBP
Retailer 8£2,176 GBP
Retailer 9£2,176 GBP
Retailer 10£2,259 GBP
Retailer 2£2,362 GBP
Retailer 5£2,485 GBP
Retailer 11£2,510 GBP
Retailer 7£2,811 GBP
Retailer 6£4,005 GBP
NZ Jewellers£4,185 GBP

40 data points across 12 retailers

15 retailers£1,948 GBP to £4,185 GBP

B+
Cheapest Retailer
-
£1,948 GBP
B+
Retailer 2
-
£2,008 GBP
View
Final sale: no returns
B+
Retailer 3
-
£2,043 GBP
View
Retailer 4
-
£2,176 GBP
View
Price last confirmed 8 days ago
B
Retailer 5
-
£2,176 GBP
View
B
Retailer 6
-
£2,197 GBP
View
B
Retailer 7
-
£2,259 GBP
View
B
Retailer 8
-
£2,301 GBP
View
B
Retailer 9
-
£2,362 GBP
View
B
Retailer 10
-
£2,485 GBP
View
B
Retailer 11
-
£2,510 GBP
View
Retailer 12
-
£2,787 GBP
View
Price last confirmed 14 days ago
B
Retailer 13
-
£2,811 GBP
View
C
Retailer 14
-
£4,005 GBP
View
Most Expensive
C
NZ Jewellers
130f251f-21d6-4e17-b20d-36eb62164a44 · Nov 5
£4,185 GBP
$5,601 USD
View
14 more retailers have this diamond
Prices start from £1,948 GBPSave up to £2,236 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
£1,948 GBP