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Radiant|Natural|GIA

1.51ct L SI2 Radiant Natural Diamond

EX • L/SI2 • GIA 6435273121

Certificate GIA 6435273121

Diamond specifications and retailer prices

From £2,043 GBP
As of November 7, 2026
Save £830 GBP (29%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £4,338 GBP at NZ Jewellers · As of October 18, 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 L colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6435273121. Listed at 9 retailers as of November 4, 2026, with a 41% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
L
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6435273121
Dimensions6.76 × 5.55 × 3.99 mm
L/W Ratio1.22
Top View
6.76 mm5.55 mm1.51 ctL / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6435273121
Side View
Table 66.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 71.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 7
Current: £4,338 GBP|Low: £1,960 GBP|High: £4,338 GBP|Avg: £2,658 GBP
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 4, 2026
Retailer 4£1,960 GBP
Retailer 12£2,043 GBP
Retailer 10£2,211 GBP
Retailer 7£2,490 GBP
Retailer 2£2,523 GBP
Retailer 6£2,577 GBP
Retailer 9£2,586 GBP
Retailer 11£2,598 GBP
Retailer 5£2,873 GBP
Retailer 8£2,894 GBP
Retailer 3£2,963 GBP
NZ Jewellers£4,338 GBP

28 data points across 12 retailers

9 retailers£2,043 GBP to £2,873 GBP

B+
Cheapest Retailer
-
£2,043 GBP
Retailer 2
-
£2,211 GBP
View
Price last confirmed 18 days ago
Retailer 3
-
£2,490 GBP
View
Price last confirmed 18 days ago
B
Retailer 4
-
£2,523 GBP
View
B
Retailer 5
-
£2,577 GBP
View
Retailer 6
-
£2,586 GBP
View
Price last confirmed 22 days ago
B
Retailer 7
-
£2,598 GBP
View
B
Retailer 8
-
£2,873 GBP
View
Most Expensive
NZ Jewellers
759621d4-8cbd-412f-946b-2d0f3f45db12 · Oct 18
£4,338 GBP
$5,807 USD
View
Price last confirmed 20 days ago
8 more retailers have this diamond
Prices start from £2,043 GBPSave up to £830 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.

B+
1.51ct Radiant
£2,043 GBP