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Marquise|Natural|IGI

1.51ct K SI1 Marquise Natural Diamond

EX • K/SI1 • IGI 803629208

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 803629208

Diamond specifications and retailer prices

From £2,194 GBP
As of November 6, 2026
Save £2,176 GBP (50%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,371 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 803629208. Listed at 15 retailers as of November 5, 2026, with prices from £2,194 to £4,371, a £2,176 spread on the same certified stone. NZ Jewellers lists it at £4,371. 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

1.51
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle41.2°
OriginNatural
Grading LabIGI
CertificateIGI 803629208
Dimensions11.92 × 5.91 × 3.73 mm
L/W Ratio2.02
Girdle conditionFaceted
Top View
11.92 mm5.91 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 803629208
Side View
Table 61.0%Crown 34.8°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.1%

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 6
Current: £4,371 GBP|Low: £2,194 GBP|High: £4,504 GBP|Avg: £2,920 GBP|-3.0%
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
November 6, 2026
Retailer 2£2,194 GBP
Retailer 5£2,387 GBP
Retailer 8£2,397 GBP
Retailer 6£2,400 GBP
Retailer 14£2,424 GBP
Retailer 4£2,509 GBP
Retailer 9£2,578 GBP
Retailer 7£2,586 GBP
Retailer 10£2,588 GBP
Retailer 15£2,605 GBP
Retailer 3£2,762 GBP
Retailer 11£2,852 GBP
Retailer 12£3,062 GBP
Retailer 13£4,183 GBP
NZ Jewellers£4,371 GBP

30 data points across 15 retailers

15 retailers£2,194 GBP to £4,371 GBP

A
Cheapest Retailer
-
£2,194 GBP
A
Retailer 2
-
£2,387 GBP
View
A
Retailer 3
-
£2,397 GBP
View
A
Retailer 4
-
£2,400 GBP
View
B+
Retailer 5
-
£2,424 GBP
View
A
Retailer 6
-
£2,509 GBP
View
A
Retailer 7
-
£2,578 GBP
View
Retailer 8
-
£2,586 GBP
View
Price last confirmed 9 days ago
A
Retailer 9
-
£2,588 GBP
View
A
Retailer 10
-
£2,605 GBP
View
A
Retailer 11
-
£2,762 GBP
View
A
Retailer 12
-
£2,852 GBP
View
A
Retailer 13
-
£3,062 GBP
View
B+
Retailer 14
-
£4,183 GBP
View
Most Expensive
B+
NZ Jewellers
ca66ec14-a278-4bb1-b408-71a51fcce9b5 · Nov 5
£4,371 GBP
$5,850 USD
View
14 more retailers have this diamond
Prices start from £2,194 GBPSave up to £2,176 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
1.51ct Marquise
£2,194 GBP