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Radiant|Natural|GIA

1.51ct F SI1 Radiant Natural Diamond

VG • F/SI1 • GIA 5533523871

Certificate GIA 5533523871

Diamond specifications and retailer prices

From £3,894 GBP
As of November 5, 2026
Save £732 GBP (16%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £4,626 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 5533523871. Listed at 5 retailers as of November 5, 2026, with prices from £3,894 to £4,626, a £732 spread on the same certified stone. Blue Nile lists it at £4,626. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
F
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.2°
Pavilion angle55.2°
OriginNatural
Grading LabGIA
CertificateGIA 5533523871
Dimensions7.68 × 5.99 × 4.07 mm
L/W Ratio1.28
Top View
7.68 mm5.99 mm1.51 ctF / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5533523871
Side View
Table 69.0%Crown 46.2°Girdle: STK-THKPavilion 55.2°Culet: NoneDepth 68.0%

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 5
Current: £4,626 GBP|Low: £3,864 GBP|High: £4,736 GBP|Avg: £4,222 GBP|-2.3%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 7, 2026
Retailer 4£3,894 GBP
Retailer 5£3,905 GBP
Retailer 2£4,066 GBP
Retailer 3£4,430 GBP
Blue Nile£4,626 GBP

43 data points across 5 retailers

5 retailers£3,894 GBP to £4,626 GBP

A
Cheapest Retailer
-
£3,894 GBP
A
Retailer 2
-
£3,905 GBP
View
A
Retailer 3
-
£4,066 GBP
View
A
Retailer 4
-
£4,430 GBP
View
Most Expensive
A
Blue Nile
26827868 · Nov 5
£4,626 GBP
$6,192 USD
View
4 more retailers have this diamond
Prices start from £3,894 GBPSave up to £732 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
£3,894 GBP