CaratHunter
Plans
Marquise|Natural|IGI

1.51ct K SI2 Marquise Natural Diamond

VG • K/SI2 • IGI 778617511

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 778617511

Diamond specifications and retailer prices

From £1,638 GBP
As of November 6, 2026
Save £1,976 GBP (55%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,530 GBP at NZ Jewellers · As of September 25, 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 SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 778617511. Listed at 12 retailers as of November 4, 2026, with a 121% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
K
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle39.8°
OriginNatural
Grading LabIGI
CertificateIGI 778617511
Dimensions11.41 × 6.00 × 3.79 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizePointed
Top View
11.41 mm6.00 mm1.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 778617511
Side View
Table 58.0%Crown 34.4°Girdle: STK-THKPavilion 39.8°Culet: NoneDepth 63.2%

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: Nov 6
Current: £1,638 GBP|Low: £1,638 GBP|High: £3,668 GBP|Avg: £2,330 GBP|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 1£1,638 GBP
Retailer 5£1,941 GBP
Retailer 8£2,071 GBP
Retailer 6£2,087 GBP
Retailer 9£2,273 GBP
Retailer 4£2,282 GBP
Retailer 7£2,480 GBP
Retailer 2£2,529 GBP
Retailer 3£3,614 GBP

46 data points across 9 retailers

12 retailers£1,638 GBP to £3,614 GBP

A
Cheapest Retailer
-
£1,638 GBP
B+
Retailer 2
-
£1,941 GBP
View
B+
Retailer 3
-
£2,071 GBP
View
B+
Retailer 4
-
£2,087 GBP
View
Retailer 5
-
£2,167 GBP
View
Price last confirmed 45 days ago
B+
Retailer 6
-
£2,273 GBP
View
B+
Retailer 7
-
£2,282 GBP
View
Retailer 8
-
£2,480 GBP
View
Price last confirmed 38 days ago
Retailer 9
-
£2,501 GBP
View
Price last confirmed 43 days ago
B+
Retailer 10
-
£2,529 GBP
View
B+
Retailer 11
-
£3,614 GBP
View
Most Expensive
NZ Jewellers
701d311b-83a9-45db-83f6-f060870e8830 · Sep 25
£4,530 GBP
$6,064 USD
View
Price last confirmed 42 days ago
11 more retailers have this diamond
Prices start from £1,638 GBPSave up to £1,976 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
£1,638 GBP