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Marquise|Natural|IGI

1.00ct K SI1 Marquise Natural Diamond

EX • K/SI1 • IGI 689598873

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 689598873

Diamond specifications and retailer prices

From £1,151 GBP
As of November 4, 2026
Save £1,877 GBP (62%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,027 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 689598873. Listed at 16 retailers as of November 5, 2026, with prices from £1,151 to £3,027, a £1,877 spread on the same certified stone. NZ Jewellers lists it at £3,027. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.3°
OriginNatural
Grading LabIGI
CertificateIGI 689598873
Dimensions10.77 × 5.18 × 3.15 mm
L/W Ratio2.08
Girdle conditionFaceted
Top View
10.77 mm5.18 mm1.00 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 689598873
Side View
Table 60.0%Crown 34.3°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 60.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £3,027 GBP|Low: £1,151 GBP|High: £3,027 GBP|Avg: £1,488 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
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 6£1,151 GBP
Retailer 14£1,151 GBP
Retailer 11£1,154 GBP
Retailer 2£1,204 GBP
Retailer 8£1,222 GBP
Retailer 5£1,241 GBP
Retailer 7£1,241 GBP
Retailer 15£1,298 GBP
Retailer 16£1,298 GBP
Retailer 3£1,343 GBP
Retailer 9£1,400 GBP
Retailer 4£1,432 GBP
Retailer 10£1,514 GBP
Retailer 12£1,688 GBP
Retailer 13£2,174 GBP
NZ Jewellers£3,027 GBP

24 data points across 16 retailers

16 retailers£1,151 GBP to £3,027 GBP

A
Cheapest Retailer
-
£1,151 GBP
A
Retailer 2
-
£1,151 GBP
View
A
Retailer 3
-
£1,154 GBP
View
A
Retailer 4
-
£1,204 GBP
View
A
Retailer 5
-
£1,222 GBP
View
Retailer 6
-
£1,241 GBP
View
Price last confirmed 21 days ago
A
Retailer 7
-
£1,241 GBP
View
B+
Retailer 8
-
£1,298 GBP
View
B+
Retailer 9
-
£1,298 GBP
View
B+
Retailer 10
-
£1,343 GBP
View
B+
Retailer 11
-
£1,400 GBP
View
B+
Retailer 12
-
£1,432 GBP
View
B+
Retailer 13
-
£1,514 GBP
View
B+
Retailer 14
-
£1,688 GBP
View
B
Retailer 15
-
£2,174 GBP
View
Most Expensive
C
NZ Jewellers
ebedcac4-57b0-4921-9ad9-c20506f08906 · Nov 5
£3,027 GBP
$4,052 USD
View
15 more retailers have this diamond
Prices start from £1,151 GBPSave up to £1,877 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
£1,151 GBP