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Round|Natural|GIA

1.51ct N SI1 Round Natural Diamond

VG • N/SI1 • GIA 2477655294

Certificate GIA 2477655294

Diamond specifications and retailer prices

From £3,158 GBP
As of November 5, 2026
Save £1,337 GBP (30%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £6,418 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 2477655294. Listed at 8 retailers as of November 5, 2026, with a 42% 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
N
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2477655294
Dimensions7.18 × 7.22 × 4.56 mm
L/W Ratio1.01
Star length55%
Lower girdle80%
Top View
7.18 mm7.22 mm1.51 ctN / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2477655294
Side View
Table 57.0%Crown 37°Girdle: ThickPavilion 40.8°Culet: NoneDepth 63.4%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £6,418 GBP|Low: £2,569 GBP|High: £6,418 GBP|Avg: £4,015 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£2,569 GBP
Retailer 4£3,158 GBP
Retailer 5£3,338 GBP
Retailer 6£3,338 GBP
Retailer 8£3,338 GBP
Retailer 7£3,851 GBP
Retailer 3£4,137 GBP
Retailer 2£4,494 GBP
Retailer 9£5,391 GBP
NZ Jewellers£6,418 GBP

24 data points across 10 retailers

8 retailers£3,158 GBP to £4,494 GBP

B
Cheapest Retailer
-
£3,158 GBP
Retailer 2
-
£3,338 GBP
View
Price last confirmed 8 days ago
B
Retailer 3
-
£3,338 GBP
View
B
Retailer 4
-
£3,338 GBP
View
C
Retailer 5
-
£3,851 GBP
View
C
Retailer 6
-
£4,137 GBP
View
C
Retailer 7
-
£4,494 GBP
View
Most Expensive
NZ Jewellers
149fd3a0-fdc6-425c-8fef-6ae6240cda24 · Nov 5
£6,418 GBP
$8,638 USD
View
Price under review
7 more retailers have this diamond
Prices start from £3,158 GBPSave up to £1,337 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
£3,158 GBP