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Radiant|Natural|GIA

1.51ct F SI2 Radiant Natural Diamond

EX • F/SI2 • GIA 6551450041

Certificate GIA 6551450041

Diamond specifications and retailer prices

From £3,405 GBP
As of November 2, 2026
Save £2,892 GBP (46%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £6,297 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 F 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 6551450041. Listed at 5 retailers as of November 2, 2026, with prices from £3,405 to £6,297, a £2,892 spread on the same certified stone. NZ Jewellers lists it at £6,297. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle49.99°
Pavilion angle37.17°
OriginNatural
Grading LabGIA
CertificateGIA 6551450041
Dimensions7.69 × 5.69 × 3.95 mm
L/W Ratio1.35
Girdle conditionVery Thick
Key to symbols
Crystal, Feather, Needle
Top View
7.69 mm5.69 mm1.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6551450041
Side View
Table 72.0%Crown 49.99°GirdlePavilion 37.17°Culet: NoneDepth 69.5%

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: Nov 2
Current: £6,297 GBP|Low: £3,375 GBP|High: £6,511 GBP|Avg: £4,422 GBP|-3.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 6£3,375 GBP
Retailer 3£3,405 GBP
Retailer 2£3,591 GBP
Retailer 5£3,615 GBP
Retailer 4£5,756 GBP
NZ Jewellers£6,297 GBP

30 data points across 6 retailers

5 retailers£3,405 GBP to £6,297 GBP

A
Cheapest Retailer
-
£3,405 GBP
A
Retailer 2
-
£3,591 GBP
View
A
Retailer 3
-
£3,615 GBP
View
B+
Retailer 4
-
£5,756 GBP
View
Most Expensive
B
NZ Jewellers
80870a86-fca2-418a-b14a-2f2733de10a6 · Nov 3
£6,297 GBP
$8,429 USD
View
4 more retailers have this diamond
Prices start from £3,405 GBPSave up to £2,892 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
£3,405 GBP