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Round|Natural|GIA

1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 5242042566

Certificate GIA 5242042566

Diamond specifications and retailer prices

From £2,512 GBP
HK$26,300 HKD
As of November 1, 2026
Save £3,456 GBP (58%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £5,968 GBP at NZ Jewellers · As of October 30, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5242042566. Listed at 9 retailers as of October 30, 2026, with prices from £2,512 to £5,968, a £3,456 spread on the same certified stone. NZ Jewellers lists it at £5,968. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 5242042566
Dimensions7.24 × 7.28 × 4.56 mm
L/W Ratio1.01
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
7.24 mm7.28 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5242042566
Side View
Table 58.0%CrownGirdle: Slightly ThickPavilion 41°Culet: NoneDepth 62.8%

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 1
Current: £5,968 GBP|Low: £2,493 GBP|High: £6,383 GBP|Avg: £4,140 GBP|-6.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 5£2,512 GBP
Retailer 9£3,197 GBP
Retailer 6£3,426 GBP
Retailer 7£3,426 GBP
Retailer 8£3,647 GBP
Retailer 4£3,855 GBP
Retailer 2£4,092 GBP
Retailer 3£5,457 GBP
NZ Jewellers£5,968 GBP

39 data points across 9 retailers

9 retailers£2,512 GBP to £5,968 GBP

A
Cheapest Retailer
-
£2,512 GBP
HK$26,300 HKD
B+
Retailer 2
-
£3,197 GBP
SGD 5,788 SGD
View
B+
Retailer 3
-
£3,426 GBP
$4,590 USD
View
B+
Retailer 4
-
£3,426 GBP
$4,590 USD
View
B+
Retailer 5
-
£3,647 GBP
$4,886 USD
View
B+
Retailer 6
-
£3,855 GBP
€4,919 EUR
View
B
Retailer 7
-
£4,092 GBP
View
B
Retailer 8
-
£5,457 GBP
View
Most Expensive
B
NZ Jewellers
94b0a966-6652-4bf5-97c4-71571a5704a1 · Oct 30
£5,968 GBP
$7,997 USD
View
8 more retailers have this diamond
Prices start from £2,512 GBPSave up to £3,456 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
£2,512 GBP