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Radiant|Natural|GIA

1.51ct G IF Radiant Natural Diamond

VG • G/IF • GIA 6551864390

Certificate GIA 6551864390

Diamond specifications and retailer prices

From £6,627 GBP
$8,880 USD
As of October 29, 2026
Save £1,158 GBP (15%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £7,785 GBP at Blue Nile · As of October 29, 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 G colour (near-colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6551864390. Listed at 4 retailers as of October 29, 2026, with prices from £6,627 to £7,785, a £1,158 spread on the same certified stone. Blue Nile lists it at £7,785. 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
G
Colour
IF
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551864390
Dimensions7.49 × 5.84 × 4.00 mm
L/W Ratio1.28
Top View
7.49 mm5.84 mm1.51 ctG / IF
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551864390
Side View
Table 68.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 68.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: £7,785 GBP|Low: £6,538 GBP|High: £7,877 GBP|Avg: £7,008 GBP|-1.2%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
October 29, 2026
Retailer 4£6,627 GBP
Retailer 2£6,639 GBP
Retailer 3£6,889 GBP
Blue Nile£7,785 GBP

21 data points across 4 retailers

4 retailers£6,627 GBP to £7,785 GBP

A
Cheapest Retailer
-
£6,627 GBP
$8,880 USD
A
Retailer 2
-
£6,639 GBP
View
A
Retailer 3
-
£6,889 GBP
$9,230 USD
View
Most Expensive
A
Blue Nile
30005370 · Oct 29
£7,785 GBP
$10,431 USD
View
3 more retailers have this diamond
Prices start from £6,627 GBPSave up to £1,158 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
£6,627 GBP