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Round|Natural|IGI

1.51ct K SI1 Round Natural Diamond

VG • K/SI1 • IGI 754512197

Shape and cutting style on the report: Round brilliant

Certificate IGI 754512197

Diamond specifications and retailer prices

From £1,524 GBP
As of November 6, 2026
Save £2,427 GBP (61%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £3,951 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 754512197. Listed at 20 retailers as of November 5, 2026, with prices from £1,524 to £3,951, a £2,427 spread on the same certified stone. NZ Jewellers lists it at £3,951. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38.7°
Pavilion angle40.2°
OriginNatural
Grading LabIGI
CertificateIGI 754512197
Dimensions7.09 × 7.13 × 4.61 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.09 mm7.13 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 754512197
Side View
Table 57.0%Crown 38.7°Girdle: STK-THKPavilion 40.2°Culet: NoneDepth 64.8%

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: £3,951 GBP|Low: £1,524 GBP|High: £3,951 GBP|Avg: £2,189 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
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 6, 2026
Retailer 2£1,524 GBP
Retailer 19£1,631 GBP
Retailer 10£1,707 GBP
Retailer 3£1,709 GBP
Retailer 17£1,718 GBP
Retailer 5£1,890 GBP
Retailer 7£1,890 GBP
Retailer 8£1,936 GBP
Retailer 6£1,977 GBP
Retailer 4£1,994 GBP
Retailer 14£2,024 GBP
Retailer 13£2,058 GBP
Retailer 9£2,127 GBP
Retailer 11£2,181 GBP
Retailer 15£2,217 GBP
Retailer 16£2,307 GBP
Retailer 18£2,345 GBP
Retailer 12£2,907 GBP
Retailer 20£3,311 GBP
NZ Jewellers£3,951 GBP

23 data points across 20 retailers

20 retailers£1,524 GBP to £3,951 GBP

A
Cheapest Retailer
-
£1,524 GBP
A
Retailer 2
-
£1,631 GBP
View
B+
Retailer 3
-
£1,707 GBP
View
A
Retailer 4
-
£1,709 GBP
View
A
Retailer 5
-
£1,718 GBP
View
B+
Retailer 6
-
£1,890 GBP
View
Retailer 7
-
£1,890 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£1,936 GBP
View
B+
Retailer 9
-
£1,977 GBP
View
B+
Retailer 10
-
£1,994 GBP
View
B+
Retailer 11
-
£2,024 GBP
View
B+
Retailer 12
-
£2,058 GBP
View
B+
Retailer 13
-
£2,127 GBP
View
B+
Retailer 14
-
£2,181 GBP
View
B+
Retailer 15
-
£2,217 GBP
View
B+
Retailer 16
-
£2,307 GBP
View
B+
Retailer 17
-
£2,345 GBP
View
B+
Retailer 18
-
£2,907 GBP
View
B+
Retailer 19
-
£3,311 GBP
View
Most Expensive
B
NZ Jewellers
bbce782d-a238-4417-9b66-8eb95b477819 · Nov 5
£3,951 GBP
$5,318 USD
View
19 more retailers have this diamond
Prices start from £1,524 GBPSave up to £2,427 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 Round
£1,524 GBP