CaratHunter
Plans
Radiant|Natural|GIA

1.51ct J SI2 Radiant Natural Diamond

EX • J/SI2 • GIA 1242037201

Certificate GIA 1242037201

Diamond specifications and retailer prices

From £2,486 GBP
As of November 6, 2026
Save £3,428 GBP (58%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £5,915 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1242037201. Listed at 7 retailers as of November 5, 2026, with prices from £2,486 to £5,915, a £3,428 spread on the same certified stone. NZ Jewellers lists it at £5,915. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle60.04°
OriginNatural
Grading LabGIA
CertificateGIA 1242037201
Dimensions7.91 × 5.61 × 3.92 mm
L/W Ratio1.41
Key to symbols
Crystal, Feather
Top View
7.91 mm5.61 mm1.51 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1242037201
Side View
Table 64.0%CrownGirdle: MED-THKPavilion 60.04°Culet: NoneDepth 69.8%

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: £5,915 GBP|Low: £2,486 GBP|High: £6,509 GBP|Avg: £4,146 GBP|-7.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5£2,486 GBP
Retailer 2£3,166 GBP
Retailer 4£3,395 GBP
Retailer 6£3,395 GBP
Retailer 7£3,714 GBP
Retailer 3£5,393 GBP
NZ Jewellers£5,915 GBP

29 data points across 7 retailers

7 retailers£2,486 GBP to £5,915 GBP

A
Cheapest Retailer
-
£2,486 GBP
B+
Retailer 2
-
£3,166 GBP
View
B+
Retailer 3
-
£3,395 GBP
View
B+
Retailer 4
-
£3,395 GBP
View
B
Retailer 5
-
£3,714 GBP
View
B
Retailer 6
-
£5,393 GBP
View
Most Expensive
B
NZ Jewellers
b561fd30-666a-4a5e-9951-9cf2b429056d · Nov 5
£5,915 GBP
$7,917 USD
View
6 more retailers have this diamond
Prices start from £2,486 GBPSave up to £3,428 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 Radiant
£2,486 GBP