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Marquise|Natural|IGI

1.51ct I SI2 Marquise Natural Diamond

VG • I/SI2 • IGI 837697198

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 837697198

Diamond specifications and retailer prices

From £2,680 GBP
$3,596 USD
As of October 31, 2026
Save £2,625 GBP (49%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £5,305 GBP at NZ Jewellers · As of November 3, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 837697198. Listed at 13 retailers as of October 31, 2026, with prices from £2,680 to £5,305, a £2,625 spread on the same certified stone. NZ Jewellers lists it at £5,305. 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

1.51
Carat
I
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle38.1°
Pavilion angle40.3°
OriginNatural
Grading LabIGI
CertificateIGI 837697198
Dimensions11.45 × 5.96 × 3.76 mm
L/W Ratio1.92
Girdle conditionFaceted
Top View
11.45 mm5.96 mm1.51 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 837697198
Side View
Table 61.0%Crown 38.1°Girdle: THK-VTKPavilion 40.3°Culet: NoneDepth 63.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £5,305 GBP|Low: £2,628 GBP|High: £5,413 GBP|Avg: £3,429 GBP|-2.0%
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
November 2, 2026
Retailer 12£2,680 GBP
Retailer 4£2,811 GBP
Retailer 11£2,857 GBP
Retailer 6£2,970 GBP
Retailer 13£3,018 GBP
Retailer 2£3,045 GBP
Retailer 9£3,045 GBP
Retailer 5£3,107 GBP
Retailer 8£3,155 GBP
Retailer 7£3,357 GBP
Retailer 3£3,514 GBP
Retailer 10£5,093 GBP
NZ Jewellers£5,305 GBP

30 data points across 13 retailers

13 retailers£2,680 GBP to £5,305 GBP

A
Cheapest Retailer
-
£2,680 GBP
$3,596 USD
A
Retailer 2
-
£2,811 GBP
$3,772 USD
View
Final sale: no returns
B+
Retailer 3
-
£2,857 GBP
$3,834 USD
View
A
Retailer 4
-
£2,970 GBP
View
B+
Retailer 5
-
£3,018 GBP
$4,051 USD
View
A
Retailer 6
-
£3,045 GBP
$4,086 USD
View
A
Retailer 7
-
£3,045 GBP
$4,086 USD
View
Retailer 8
-
£3,107 GBP
$4,169 USD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
£3,155 GBP
$4,234 USD
View
B+
Retailer 10
-
£3,357 GBP
€4,291 EUR
View
B+
Retailer 11
-
£3,514 GBP
$4,715 USD
View
B+
Retailer 12
-
£5,093 GBP
View
Most Expensive
B+
NZ Jewellers
c6dbeeb5-510e-4935-8301-94ee64fb998d · Nov 3
£5,305 GBP
$7,119 USD
View
12 more retailers have this diamond
Prices start from £2,680 GBPSave up to £2,625 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
£2,680 GBP