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Marquise|Natural|GIA

1.00ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 1548811201

Certificate GIA 1548811201

Diamond specifications and retailer prices

From £1,957 GBP
As of November 4, 2026
Save £2,244 GBP (53%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,202 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 J 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 1548811201. Listed at 20 retailers as of November 4, 2026, with prices from £1,957 to £4,202, a £2,244 spread on the same certified stone. NZ Jewellers lists it at £4,202. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1548811201
Dimensions10.08 × 5.19 × 3.14 mm
L/W Ratio1.94
Key to symbols
Feather, Cavity, Indented Natural
Top View
10.08 mm5.19 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1548811201
Side View
Table 58.0%CrownGirdle: MED-ETKPavilionCulet: NoneDepth 60.5%

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: £4,202 GBP|Low: £1,680 GBP|High: £4,202 GBP|Avg: £2,641 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 3£1,957 GBP
Retailer 9£2,017 GBP
Retailer 5£2,137 GBP
Retailer 12£2,185 GBP
Retailer 13£2,185 GBP
Retailer 11£2,269 GBP
Retailer 6£2,495 GBP
Retailer 10£2,586 GBP
Retailer 2£2,642 GBP
Retailer 4£2,684 GBP
Retailer 7£2,944 GBP
Retailer 8£4,022 GBP
NZ Jewellers£4,202 GBP

46 data points across 13 retailers

20 retailers£1,957 GBP to £4,202 GBP

B+
Cheapest Retailer
-
£1,957 GBP
B
Retailer 2
-
£2,017 GBP
View
Final sale: no returns
B
Retailer 3
-
£2,052 GBP
View
B+
Retailer 4
-
£2,137 GBP
View
B
Retailer 5
-
£2,185 GBP
View
Retailer 6
-
£2,185 GBP
View
Price last confirmed 8 days ago
B
Retailer 7
-
£2,269 GBP
View
Retailer 8
-
£2,405 GBP
View
Price last confirmed 66 days ago
B
Retailer 9
-
£2,488 GBP
View
B
Retailer 10
-
£2,488 GBP
View
B
Retailer 11
-
£2,495 GBP
View
B
Retailer 12
-
£2,521 GBP
View
B
Retailer 13
-
£2,570 GBP
View
Retailer 14
-
£2,586 GBP
View
Price last confirmed 33 days ago
B
Retailer 15
-
£2,642 GBP
View
B
Retailer 16
-
£2,684 GBP
View
Retailer 17
-
£2,798 GBP
View
Price last confirmed 14 days ago
B
Retailer 18
-
£2,944 GBP
View
B
Retailer 19
-
£4,022 GBP
View
Most Expensive
B
NZ Jewellers
f36cd918-2cfb-49aa-91f3-8c1954f56ac2 · Nov 5
£4,202 GBP
$5,624 USD
View
19 more retailers have this diamond
Prices start from £1,957 GBPSave up to £2,244 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
£1,957 GBP