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Radiant|Natural|GIA

1.51ct I SI2 Radiant Natural Diamond

ID • I/SI2 • GIA 6512748750

Certificate GIA 6512748750

Diamond specifications and retailer prices

From £3,127 GBP
As of November 2, 2026
Save £2,459 GBP (44%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £5,586 GBP at NZ Jewellers · As of November 3, 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 I 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 6512748750. Listed at 6 retailers as of November 2, 2026, with prices from £3,127 to £5,586, a £2,459 spread on the same certified stone. NZ Jewellers lists it at £5,586. 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
I
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.29°
Pavilion angle30.13°
OriginNatural
Grading LabGIA
CertificateGIA 6512748750
Dimensions7.85 × 5.68 × 3.74 mm
L/W Ratio1.38
Top View
7.85 mm5.68 mm1.51 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6512748750
Side View
Table 66.0%Crown 43.29°Girdle: Slightly ThickPavilion 30.13°Culet: NoneDepth 65.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £5,586 GBP|Low: £3,127 GBP|High: £5,664 GBP|Avg: £3,848 GBP|-1.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 3£3,127 GBP
Retailer 2£3,207 GBP
Retailer 5£3,207 GBP
Retailer 6£3,311 GBP
Retailer 9£3,423 GBP
Retailer 7£3,557 GBP
Retailer 8£3,634 GBP
Retailer 4£5,107 GBP
NZ Jewellers£5,586 GBP

29 data points across 9 retailers

6 retailers£3,127 GBP to £5,586 GBP

A
Cheapest Retailer
-
£3,127 GBP
A
Retailer 2
-
£3,207 GBP
View
A
Retailer 3
-
£3,207 GBP
View
A
Retailer 4
-
£3,311 GBP
View
B+
Retailer 5
-
£5,107 GBP
View
Most Expensive
B
NZ Jewellers
d94f7b69-be2e-462a-b5bf-7ce1ebfe390a · Nov 3
£5,586 GBP
$7,477 USD
View
5 more retailers have this diamond
Prices start from £3,127 GBPSave up to £2,459 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
£3,127 GBP