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Round|Natural|GIA

1.51ct N SI1 Round Natural Diamond

VG • N/SI1 • GIA 2225163808

Certificate GIA 2225163808

Diamond specifications and retailer prices

From £1,846 GBP
As of November 5, 2026
Save £2,453 GBP (57%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £4,299 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 N colour (tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 2225163808. Listed at 9 retailers as of November 5, 2026, with prices from £1,846 to £4,299, a £2,453 spread on the same certified stone. NZ Jewellers lists it at £4,299. 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
N
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceMedium
Crown angle36°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2225163808
Dimensions7.16 × 7.21 × 4.61 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Girdle conditionFaceted
Culet sizeNone
Top View
7.16 mm7.21 mm1.51 ctN / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2225163808
Side View
Table 59.0%Crown 36°Girdle: STK-THKPavilion 41.4°Culet: NoneDepth 64.1%

Caratlytics Score

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

Price History

Last verified: Nov 5
Current: £4,299 GBP|Low: £1,365 GBP|High: £4,299 GBP|Avg: £2,323 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 10£1,365 GBP
Retailer 9£1,846 GBP
Retailer 5£1,863 GBP
Retailer 7£1,863 GBP
Retailer 4£1,949 GBP
Retailer 6£2,149 GBP
Retailer 2£2,389 GBP
Retailer 3£2,510 GBP
Retailer 8£2,962 GBP
NZ Jewellers£4,299 GBP

21 data points across 10 retailers

9 retailers£1,846 GBP to £4,299 GBP

B+
Cheapest Retailer
-
£1,846 GBP
Retailer 2
-
£1,863 GBP
View
Price last confirmed 8 days ago
B+
Retailer 3
-
£1,863 GBP
View
B+
Retailer 4
-
£1,949 GBP
View
B
Retailer 5
-
£2,149 GBP
View
B
Retailer 6
-
£2,389 GBP
View
B
Retailer 7
-
£2,510 GBP
View
B
Retailer 8
-
£2,962 GBP
View
Most Expensive
C
NZ Jewellers
0d200bc3-f88b-48ea-9fd2-083b995f5b2c · Nov 5
£4,299 GBP
$5,786 USD
View
8 more retailers have this diamond
Prices start from £1,846 GBPSave up to £2,453 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
£1,846 GBP