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Radiant|Natural|GIA

1.51ct F SI1 Radiant Natural Diamond

ID • F/SI1 • GIA 2556028833

Certificate GIA 2556028833

Diamond specifications and retailer prices

From £4,451 GBP
$5,973 USD
As of November 2, 2026
Save £3,990 GBP (47%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £8,442 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 F 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 2556028833. Listed at 9 retailers as of October 30, 2026, with prices from £4,451 to £8,442, a £3,990 spread on the same certified stone. NZ Jewellers lists it at £8,442. 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
F
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.89°
Pavilion angle34.11°
OriginNatural
Grading LabGIA
CertificateGIA 2556028833
Dimensions7.58 × 5.77 × 3.90 mm
L/W Ratio1.31
Top View
7.58 mm5.77 mm1.51 ctF / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556028833
Side View
Table 70.0%Crown 44.89°Girdle: Slightly ThickPavilion 34.11°Culet: NoneDepth 67.6%

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: £8,442 GBP|Low: £4,451 GBP|High: £8,641 GBP|Avg: £5,608 GBP|-2.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 9£4,451 GBP
Retailer 8£4,680 GBP
Retailer 5£4,722 GBP
Retailer 12£4,918 GBP
Retailer 10£5,041 GBP
Retailer 6£5,047 GBP
Retailer 2£5,125 GBP
Retailer 11£5,197 GBP
Retailer 4£5,374 GBP
Retailer 3£5,712 GBP
Retailer 7£7,436 GBP
NZ Jewellers£8,442 GBP

39 data points across 12 retailers

9 retailers£4,451 GBP to £8,442 GBP

A
Cheapest Retailer
-
£4,451 GBP
$5,973 USD
A
Retailer 2
-
£4,680 GBP
$6,280 USD
View
A
Retailer 3
-
£4,722 GBP
View
Retailer 4
-
£5,041 GBP
A$10,408 AUD
View
Price last confirmed 29 days ago
A
Retailer 5
-
£5,047 GBP
$6,773 USD
View
A
Retailer 6
-
£5,125 GBP
$6,877 USD
View
B+
Retailer 7
-
£5,197 GBP
$6,974 USD
View
B+
Retailer 8
-
£7,436 GBP
View
Most Expensive
B
NZ Jewellers
8996cd54-20d8-49ae-966b-2b52284cc1fc · Oct 30
£8,442 GBP
$11,328 USD
View
8 more retailers have this diamond
Prices start from £4,451 GBPSave up to £3,990 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
£4,451 GBP