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Radiant|Natural|GIA

1.51ct E SI1 Radiant Natural Diamond

ID • E/SI1 • GIA 1559156534

Certificate GIA 1559156534

Diamond specifications and retailer prices

From £4,175 GBP
$5,560 USD
As of October 29, 2026
Save £3,313 GBP (44%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £7,488 GBP at NZ Jewellers · As of October 27, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1559156534. Listed at 9 retailers as of October 27, 2026, with prices from £4,175 to £7,488, a £3,313 spread on the same certified stone. NZ Jewellers lists it at £7,488. 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
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle54.56°
Pavilion angle35.61°
OriginNatural
Grading LabGIA
CertificateGIA 1559156534
Dimensions7.23 × 5.70 × 4.02 mm
L/W Ratio1.27
Girdle conditionVery Thick
Key to symbols
Crystal, Cloud, Feather, Cavity, Needle, Indented Natural
Top View
7.23 mm5.70 mm1.51 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559156534
Side View
Table 74.0%Crown 54.56°Girdle: MED-VTKPavilion 35.61°Culet: NoneDepth 70.5%

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 29
Current: £7,488 GBP|Low: £4,018 GBP|High: £7,566 GBP|Avg: £4,962 GBP|-1.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 11£4,018 GBP
Retailer 8£4,175 GBP
Retailer 2£4,213 GBP
Retailer 10£4,325 GBP
Retailer 5£4,477 GBP
Retailer 6£4,477 GBP
Retailer 7£4,485 GBP
Retailer 9£4,556 GBP
Retailer 3£4,764 GBP
Retailer 4£6,632 GBP
NZ Jewellers£7,488 GBP

37 data points across 11 retailers

9 retailers£4,175 GBP to £7,488 GBP

A
Cheapest Retailer
-
£4,175 GBP
$5,560 USD
A
Retailer 2
-
£4,213 GBP
View
A
Retailer 3
-
£4,325 GBP
$5,760 USD
View
Price last confirmed 29 days ago
A
Retailer 4
-
£4,477 GBP
$5,962 USD
View
A
Retailer 5
-
£4,477 GBP
$5,962 USD
View
A
Retailer 6
-
£4,485 GBP
A$9,188 AUD
View
Price last confirmed 19 days ago
A
Retailer 7
-
£4,556 GBP
$6,067 USD
View
B+
Retailer 8
-
£6,632 GBP
View
Most Expensive
B
NZ Jewellers
4ae519c7-44c9-4346-8684-d693f49de9c5 · Oct 27
£7,488 GBP
$9,972 USD
View
8 more retailers have this diamond
Prices start from £4,175 GBPSave up to £3,313 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
£4,175 GBP