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Round|Natural|IGI

1.51ct K SI2 Round Natural Diamond

VG • K/SI2 • IGI 581308742

Shape and cutting style on the report: Round brilliant

Certificate IGI 581308742

Diamond specifications and retailer prices

From £1,352 GBP
As of November 4, 2026
Save £2,229 GBP (62%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,581 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round 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 581308742. Listed at 16 retailers as of November 4, 2026, with prices from £1,352 to £3,581, a £2,229 spread on the same certified stone. NZ Jewellers lists it at £3,581. 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
SymmetryVery Good
FluorescenceFaint
Crown angle31.8°
Pavilion angle42°
OriginNatural
Grading LabIGI
CertificateIGI 581308742
Dimensions7.35 × 7.26 × 4.46 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.35 mm7.26 mm1.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateIGI 581308742
Side View
Table 66.0%Crown 31.8°Girdle: MED-THKPavilion 42°Culet: NoneDepth 60.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £3,581 GBP|Low: £1,022 GBP|High: £3,581 GBP|Avg: £1,991 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
November 5, 2026
Retailer 10£1,352 GBP
Retailer 2£1,502 GBP
Retailer 14£1,560 GBP
Retailer 11£1,586 GBP
Retailer 3£1,713 GBP
Retailer 5£1,713 GBP
Retailer 13£1,768 GBP
Retailer 15£1,792 GBP
Retailer 6£1,816 GBP
Retailer 4£1,976 GBP
Retailer 7£2,038 GBP
Retailer 9£2,129 GBP
Retailer 12£2,418 GBP
Retailer 8£2,993 GBP
NZ Jewellers£3,581 GBP

34 data points across 15 retailers

16 retailers£1,352 GBP to £3,581 GBP

Retailer 1
-
£1,022 GBP
Price last confirmed 43 days ago
B+
Retailer 2
-
£1,352 GBP
View
B+
Retailer 3
-
£1,502 GBP
View
B+
Retailer 4
-
£1,547 GBP
View
B+
Retailer 5
-
£1,560 GBP
View
B+
Retailer 6
-
£1,586 GBP
View
B+
Retailer 7
-
£1,713 GBP
View
Retailer 8
-
£1,713 GBP
View
Price last confirmed 12 days ago
B+
Retailer 9
-
£1,768 GBP
View
B+
Retailer 10
-
£1,792 GBP
View
B+
Retailer 11
-
£1,816 GBP
View
B+
Retailer 12
-
£1,976 GBP
View
B+
Retailer 13
-
£2,129 GBP
View
B+
Retailer 14
-
£2,418 GBP
View
B+
Retailer 15
-
£2,993 GBP
View
Most Expensive
B
NZ Jewellers
856628e2-e34b-42a0-82cc-1cc28a2772fb · Nov 5
£3,581 GBP
$4,820 USD
View
15 more retailers have this diamond
Prices start from £1,352 GBPSave up to £2,229 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+
1.51ct Round
£1,352 GBP