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Radiant|Natural|GIA

1.51ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 2235951484

Certificate GIA 2235951484

Diamond specifications and retailer prices

From £3,651 GBP
$4,900 USD
As of November 1, 2026
Save £4,166 GBP (53%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £7,818 GBP at NZ Jewellers · As of October 30, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2235951484. Listed at 22 retailers as of October 30, 2026, with prices from £3,651 to £7,818, a £4,166 spread on the same certified stone. NZ Jewellers lists it at £7,818. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle44.08°
OriginNatural
Grading LabGIA
CertificateGIA 2235951484
Dimensions7.91 × 5.75 × 3.89 mm
L/W Ratio1.38
Top View
7.91 mm5.75 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2235951484
Side View
Table 65.0%Crown 44.08°Girdle: Slightly ThickPavilionCulet: NoneDepth 67.7%

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 1
Current: £7,818 GBP|Low: £3,693 GBP|High: £7,818 GBP|Avg: £4,881 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
November 2, 2026
Retailer 11£3,693 GBP
Retailer 4£3,941 GBP
Retailer 13£3,941 GBP
Retailer 12£3,957 GBP
Retailer 3£4,234 GBP
Retailer 6£4,234 GBP
Retailer 14£4,234 GBP
Retailer 5£4,464 GBP
Retailer 7£4,484 GBP
Retailer 10£4,621 GBP
Retailer 2£4,821 GBP
Retailer 8£5,743 GBP
Retailer 9£6,923 GBP
NZ Jewellers£7,818 GBP

44 data points across 14 retailers

22 retailers£3,651 GBP to £7,818 GBP

B+
Cheapest Retailer
-
£3,651 GBP
$4,900 USD
B+
Retailer 2
-
£3,693 GBP
$4,956 USD
View
B
Retailer 3
-
£3,845 GBP
A$7,938 AUD
View
B
Retailer 4
-
£3,941 GBP
CA$7,346 CAD
View
B
Retailer 5
-
£3,941 GBP
$5,289 USD
View
B
Retailer 6
-
£3,957 GBP
$5,310 USD
View
B
Retailer 7
-
£4,234 GBP
$5,682 USD
View
B
Retailer 8
-
£4,234 GBP
$5,682 USD
View
B
Retailer 9
-
£4,234 GBP
$5,682 USD
View
B
Retailer 10
-
£4,464 GBP
$5,990 USD
View
B
Retailer 11
-
£4,484 GBP
View
Retailer 12
-
£4,621 GBP
A$9,539 AUD
View
Price last confirmed 22 days ago
B
Retailer 13
-
£4,725 GBP
$6,340 USD
View
B
Retailer 14
-
£4,725 GBP
$6,340 USD
View
B
Retailer 15
-
£4,789 GBP
$6,427 USD
View
B
Retailer 16
-
£4,821 GBP
€6,162 EUR
View
B
Retailer 17
-
£4,881 GBP
$6,550 USD
View
B
Retailer 18
-
£4,886 GBP
$6,557 USD
View
Retailer 19
-
£5,154 GBP
$6,916 USD
View
Price last confirmed 10 days ago
B
Retailer 20
-
£5,743 GBP
ZAR 124,500 ZAR
View
B
Retailer 21
-
£6,923 GBP
View
Most Expensive
B
NZ Jewellers
ce8079b4-efe5-4bf1-8854-70654ab1cd25 · Oct 30
£7,818 GBP
$10,491 USD
View
21 more retailers have this diamond
Prices start from £3,651 GBPSave up to £4,166 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 Radiant
£3,651 GBP