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Radiant|Natural|GIA

1.51ct D SI2 Radiant Natural Diamond

ID • D/SI2 • GIA 1232708920

Certificate GIA 1232708920

Diamond specifications and retailer prices

From £4,755 GBP
As of October 30, 2026
Save £3,660 GBP (43%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £8,415 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 D 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 1232708920. Listed at 6 retailers as of October 30, 2026, with prices from £4,755 to £8,415, a £3,660 spread on the same certified stone. NZ Jewellers lists it at £8,415. 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
D
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle44.73°
Pavilion angle30.36°
OriginNatural
Grading LabGIA
CertificateGIA 1232708920
Dimensions7.48 × 5.58 × 3.87 mm
L/W Ratio1.34
Girdle conditionVery Thick
Key to symbols
Crystal, Feather, Needle
Top View
7.48 mm5.58 mm1.51 ctD / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1232708920
Side View
Table 65.0%Crown 44.73°Girdle: Very ThickPavilion 30.36°Culet: NoneDepth 69.4%

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 30
Current: £8,415 GBP|Low: £4,746 GBP|High: £8,543 GBP|Avg: £5,830 GBP|-1.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 2£4,755 GBP
Retailer 9£5,006 GBP
Retailer 4£5,031 GBP
Retailer 5£5,091 GBP
Retailer 6£5,109 GBP
Retailer 7£5,215 GBP
Retailer 8£5,481 GBP
Retailer 3£7,452 GBP
NZ Jewellers£8,415 GBP

28 data points across 9 retailers

6 retailers£4,755 GBP to £8,415 GBP

A
Cheapest Retailer
-
£4,755 GBP
A
Retailer 2
-
£5,031 GBP
$6,741 USD
View
A
Retailer 3
-
£5,091 GBP
$6,822 USD
View
A
Retailer 4
-
£5,109 GBP
$6,845 USD
View
B+
Retailer 5
-
£7,452 GBP
View
Most Expensive
B
NZ Jewellers
94c24dd1-7952-4c3b-bbc0-61c64eb068a7 · Oct 30
£8,415 GBP
$11,275 USD
View
5 more retailers have this diamond
Prices start from £4,755 GBPSave up to £3,660 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
£4,755 GBP