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Marquise|Natural|GIA

1.00ct H SI2 Marquise Natural Diamond

GD • H/SI2 • GIA 6555405344

Certificate GIA 6555405344

Diamond specifications and retailer prices

From £1,862 GBP
As of November 4, 2026
Save £2,537 GBP (58%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,399 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 6555405344. Listed at 14 retailers as of November 4, 2026, with prices from £1,862 to £4,399, a £2,537 spread on the same certified stone. NZ Jewellers lists it at £4,399. 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
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555405344
Dimensions10.26 × 5.03 × 3.21 mm
L/W Ratio2.04
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Needle, Natural
Top View
10.26 mm5.03 mm1.00 ctH / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555405344
Side View
Table 67.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 63.9%

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 4
Current: £2,069 GBP|Low: £1,668 GBP|High: £3,730 GBP|Avg: £2,287 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8£1,862 GBP
Retailer 7£1,884 GBP
Retailer 5£1,913 GBP
Retailer 6£1,942 GBP
Retailer 1£2,069 GBP
Retailer 9£2,185 GBP
Retailer 2£2,214 GBP
Retailer 3£2,453 GBP
Retailer 4£3,687 GBP

42 data points across 9 retailers

14 retailers£1,862 GBP to £4,399 GBP

B+
Cheapest Retailer
-
£1,862 GBP
B+
Retailer 2
-
£1,884 GBP
View
B+
Retailer 3
-
£1,913 GBP
View
B+
Retailer 4
-
£1,942 GBP
View
Final sale: no returns
B+
Retailer 5
-
£2,069 GBP
View
B+
Retailer 6
-
£2,105 GBP
View
Retailer 7
-
£2,105 GBP
View
Price last confirmed 8 days ago
B
Retailer 8
-
£2,185 GBP
View
B
Retailer 9
-
£2,210 GBP
View
B+
Retailer 10
-
£2,214 GBP
View
B
Retailer 11
-
£2,428 GBP
View
B
Retailer 12
-
£2,453 GBP
View
B
Retailer 13
-
£3,687 GBP
View
Most Expensive
C
NZ Jewellers
b702e101-71db-41e8-8975-bd4a8ae54ef1 · Nov 5
£4,399 GBP
$5,888 USD
View
13 more retailers have this diamond
Prices start from £1,862 GBPSave up to £2,537 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
£1,862 GBP