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Radiant|Natural|GIA

1.51ct K SI2 Radiant Natural Diamond

VG • K/SI2 • GIA 6505379824

Certificate GIA 6505379824

Diamond specifications and retailer prices

From £3,245 GBP
As of November 6, 2026
Save £3,764 GBP (54%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £7,009 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6505379824. Listed at 16 retailers as of November 5, 2026, with prices from £3,245 to £7,009, a £3,764 spread on the same certified stone. NZ Jewellers lists it at £7,009. 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
K
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46°
Pavilion angle56.7°
OriginNatural
Grading LabGIA
CertificateGIA 6505379824
Dimensions8.21 × 5.73 × 3.89 mm
L/W Ratio1.43
Top View
8.21 mm5.73 mm1.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6505379824
Side View
Table 70.0%Crown 46°Girdle: ThickPavilion 56.7°Culet: NoneDepth 67.9%

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 6
Current: £7,009 GBP|Low: £3,245 GBP|High: £7,009 GBP|Avg: £4,363 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
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 7, 2026
Retailer 16£3,245 GBP
Retailer 3£3,311 GBP
Retailer 8£3,328 GBP
Retailer 14£3,352 GBP
Retailer 4£3,534 GBP
Retailer 5£3,797 GBP
Retailer 6£3,797 GBP
Retailer 7£3,797 GBP
Retailer 2£4,048 GBP
Retailer 10£4,069 GBP
Retailer 9£4,176 GBP
Retailer 15£4,380 GBP
Retailer 11£4,716 GBP
Retailer 13£6,069 GBP
Retailer 12£6,657 GBP
NZ Jewellers£7,009 GBP

36 data points across 16 retailers

16 retailers£3,245 GBP to £7,009 GBP

B+
Cheapest Retailer
-
£3,245 GBP
B+
Retailer 2
-
£3,311 GBP
View
Retailer 3
-
£3,328 GBP
View
Price last confirmed 10 days ago
B+
Retailer 4
-
£3,352 GBP
View
B
Retailer 5
-
£3,534 GBP
View
Retailer 6
-
£3,797 GBP
View
Price last confirmed 9 days ago
B
Retailer 7
-
£3,797 GBP
View
B
Retailer 8
-
£3,797 GBP
View
B
Retailer 9
-
£4,048 GBP
View
B
Retailer 10
-
£4,069 GBP
View
B
Retailer 11
-
£4,176 GBP
View
B
Retailer 12
-
£4,380 GBP
View
B
Retailer 13
-
£4,716 GBP
View
C
Retailer 14
-
£6,069 GBP
View
C
Retailer 15
-
£6,657 GBP
View
Most Expensive
C
NZ Jewellers
17d9eeda-530a-4a6b-a860-8d667072c6b2 · Nov 5
£7,009 GBP
$9,381 USD
View
15 more retailers have this diamond
Prices start from £3,245 GBPSave up to £3,764 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
£3,245 GBP