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Radiant|Natural|GIA

1.51ct H SI1 Radiant Natural Diamond

GD • H/SI1 • GIA 1439197082

Certificate GIA 1439197082

Diamond specifications and retailer prices

From £4,265 GBP
As of November 6, 2026
Save £4,611 GBP (52%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £8,876 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1439197082. Listed at 17 retailers as of November 5, 2026, with prices from £4,265 to £8,876, a £4,611 spread on the same certified stone. NZ Jewellers lists it at £8,876. 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
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1439197082
Dimensions7.39 × 5.62 × 4.19 mm
L/W Ratio1.31
Key to symbols
Feather, Crystal, Needle
Top View
7.39 mm5.62 mm1.51 ctH / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1439197082
Side View
Table 72.0%CrownGirdlePavilionCulet: NoneDepth 74.6%

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: £8,876 GBP|Low: £4,226 GBP|High: £8,876 GBP|Avg: £5,601 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
Retailer 17
November 7, 2026
Retailer 14£4,265 GBP
Retailer 7£4,628 GBP
Retailer 5£4,898 GBP
Retailer 17£4,899 GBP
Retailer 6£4,912 GBP
Retailer 10£4,973 GBP
Retailer 2£5,039 GBP
Retailer 15£5,151 GBP
Retailer 8£5,254 GBP
Retailer 9£5,275 GBP
Retailer 3£5,307 GBP
Retailer 16£5,388 GBP
Retailer 11£5,766 GBP
Retailer 4£6,123 GBP
Retailer 12£6,474 GBP
Retailer 13£7,797 GBP
NZ Jewellers£8,876 GBP

30 data points across 17 retailers

17 retailers£4,265 GBP to £8,876 GBP

B+
Cheapest Retailer
-
£4,265 GBP
B+
Retailer 2
-
£4,628 GBP
View
B
Retailer 3
-
£4,898 GBP
View
Final sale: no returns
Retailer 4
-
£4,899 GBP
View
Price last confirmed 9 days ago
B
Retailer 5
-
£4,912 GBP
View
B
Retailer 6
-
£4,973 GBP
View
B
Retailer 7
-
£5,039 GBP
View
Retailer 8
-
£5,151 GBP
View
Price last confirmed 16 days ago
B
Retailer 9
-
£5,275 GBP
View
B
Retailer 10
-
£5,307 GBP
View
B
Retailer 11
-
£5,388 GBP
View
B
Retailer 12
-
£5,427 GBP
View
B
Retailer 13
-
£5,766 GBP
View
B
Retailer 14
-
£6,123 GBP
View
B
Retailer 15
-
£6,474 GBP
View
C
Retailer 16
-
£7,797 GBP
View
Most Expensive
C
NZ Jewellers
fa951e26-714d-428c-ba9c-c37894228a87 · Nov 5
£8,876 GBP
$11,880 USD
View
16 more retailers have this diamond
Prices start from £4,265 GBPSave up to £4,611 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
£4,265 GBP