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Radiant|Natural|GIA

1.51ct E SI2 Radiant Natural Diamond

EX • E/SI2

Diamond specifications and retailer prices

From £4,893 GBP
$6,516 USD
As of October 25, 2026
Save £4,894 GBP (50%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £9,878 GBP at NZ Jewellers · As of September 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 E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 19 retailers as of October 24, 2026, with a 100% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
E
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
Dimensions7.67 × 5.68 × 3.79 mm
L/W Ratio1.35
Top View
7.67 mm5.68 mm1.51 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA
Side View
Table 67.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 66.7%

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: Oct 25
Current: £9,787 GBP|Low: £4,893 GBP|High: £9,878 GBP|Avg: £5,892 GBP|-0.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 3£4,893 GBP
Retailer 10£5,039 GBP
Retailer 7£5,199 GBP
Retailer 5£5,301 GBP
Retailer 4£5,383 GBP
Retailer 8£5,486 GBP
Retailer 2£5,530 GBP
Retailer 9£5,799 GBP
Retailer 6£6,116 GBP
NZ Jewellers£9,787 GBP

40 data points across 10 retailers

19 retailers£4,893 GBP to £9,787 GBP

A
Cheapest Retailer
-
£4,893 GBP
$6,516 USD
A
Retailer 2
-
£4,893 GBP
$6,516 USD
View
Retailer 3
-
£4,939 GBP
$6,577 USD
View
Price last confirmed 22 days ago
A
Retailer 4
-
£5,039 GBP
CA$9,320 CAD
View
A
Retailer 5
-
£5,199 GBP
$6,924 USD
View
A
Retailer 6
-
£5,301 GBP
$7,059 USD
View
B+
Retailer 7
-
£5,301 GBP
$7,059 USD
View
Retailer 8
-
£5,350 GBP
$7,125 USD
View
Price last confirmed 22 days ago
B+
Retailer 9
-
£5,383 GBP
$7,168 USD
View
B+
Retailer 10
-
£5,383 GBP
$7,168 USD
View
Retailer 11
-
£5,433 GBP
$7,235 USD
View
Price last confirmed 29 days ago
B+
Retailer 12
-
£5,486 GBP
$7,306 USD
View
B+
Retailer 13
-
£5,530 GBP
View
B+
Retailer 14
-
£5,799 GBP
$7,722 USD
View
B+
Retailer 15
-
£6,116 GBP
$8,145 USD
View
Retailer 16
-
£6,174 GBP
$8,222 USD
View
Price last confirmed 53 days ago
Retailer 17
-
£6,174 GBP
$8,222 USD
View
Price last confirmed 31 days ago
B
Retailer 18
-
£9,787 GBP
$13,033 USD
View
Most Expensive
NZ Jewellers
ff8c50ad-30fc-4b3c-9998-5b3eced69d03 · Sep 30
£9,878 GBP
$13,155 USD
View
Price last confirmed 29 days ago
18 more retailers have this diamond
Prices start from £4,893 GBPSave up to £4,894 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
£4,893 GBP