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Radiant|Natural|GIA

1.51ct L SI1 Radiant Natural Diamond

EX • L/SI1 • GIA 6545196733

Certificate GIA 6545196733

Diamond specifications and retailer prices

From £2,249 GBP
As of November 7, 2026
Save £1,781 GBP (44%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £4,030 GBP at NZ Jewellers · As of November 5, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545196733. Listed at 10 retailers as of November 5, 2026, with prices from £2,249 to £4,030, a £1,781 spread on the same certified stone. NZ Jewellers lists it at £4,030. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6545196733
Dimensions7.58 × 5.59 × 3.85 mm
L/W Ratio1.36
Culet sizeNone
Key to symbols
Crystal, Needle
Top View
7.58 mm5.59 mm1.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545196733
Side View
Table 64.0%CrownGirdlePavilionCulet: NoneDepth 68.8%

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: £4,030 GBP|Low: £2,273 GBP|High: £4,030 GBP|Avg: £2,660 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 3£2,274 GBP
Retailer 6£2,313 GBP
Retailer 8£2,313 GBP
Retailer 2£2,393 GBP
Retailer 9£2,402 GBP
Retailer 7£2,669 GBP
Retailer 4£2,692 GBP
Retailer 5£2,823 GBP
NZ Jewellers£4,030 GBP

34 data points across 9 retailers

10 retailers£2,249 GBP to £4,030 GBP

B+
Cheapest Retailer
-
£2,249 GBP
B+
Retailer 2
-
£2,274 GBP
View
Retailer 3
-
£2,313 GBP
View
Price last confirmed 9 days ago
B
Retailer 4
-
£2,313 GBP
View
B+
Retailer 5
-
£2,393 GBP
View
B
Retailer 6
-
£2,402 GBP
View
B
Retailer 7
-
£2,669 GBP
View
B
Retailer 8
-
£2,692 GBP
View
B
Retailer 9
-
£2,823 GBP
View
Most Expensive
C
NZ Jewellers
0739118c-e27c-425e-bf0e-d7ea70c4c43b · Nov 5
£4,030 GBP
$5,394 USD
View
9 more retailers have this diamond
Prices start from £2,249 GBPSave up to £1,781 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
£2,249 GBP