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Radiant|Natural|GIA

1.51ct H SI1 Radiant Natural Diamond

VG • H/SI1 • GIA 1568428839

Certificate GIA 1568428839

Diamond specifications and retailer prices

From £4,338 GBP
As of November 6, 2026
Save £5,244 GBP (55%) vs most expensive(unlock to see where)
32 retailers carry this diamond
Most expensive: £9,582 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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 1568428839. Listed at 32 retailers as of November 5, 2026, with prices from £4,338 to £9,582, a £5,244 spread on the same certified stone. NZ Jewellers lists it at £9,582. 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
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1568428839
Dimensions7.70 × 6.00 × 4.11 mm
L/W Ratio1.28
Culet sizeNone
Key to symbols
Feather, Cavity, Indented Natural
Top View
7.70 mm6.00 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1568428839
Side View
Table 67.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.5%

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: £9,582 GBP|Low: £4,338 GBP|High: £9,582 GBP|Avg: £5,472 GBP
NZ Jewellers
Retailer 2
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Retailer 31
November 7, 2026
Retailer 4£4,338 GBP
Retailer 12£4,438 GBP
Retailer 6£4,527 GBP
Retailer 7£4,532 GBP
Retailer 31£4,589 GBP
Retailer 26£4,630 GBP
Retailer 11£4,791 GBP
Retailer 15£4,791 GBP
Retailer 16£4,808 GBP
Retailer 9£4,934 GBP
Retailer 13£5,091 GBP
Retailer 18£5,091 GBP
Retailer 8£5,104 GBP
Retailer 20£5,191 GBP
Retailer 19£5,271 GBP
Retailer 17£5,288 GBP
Retailer 2£5,349 GBP
Retailer 24£5,369 GBP
Retailer 21£5,376 GBP
Retailer 22£5,376 GBP
Retailer 25£5,678 GBP
Retailer 5£5,753 GBP
Retailer 23£5,753 GBP
Retailer 29£5,774 GBP
Retailer 14£5,830 GBP
Retailer 27£5,901 GBP
Retailer 10£5,947 GBP
Retailer 3£5,990 GBP
Retailer 28£6,991 GBP
Retailer 30£7,985 GBP
NZ Jewellers£9,582 GBP

10 data points across 31 retailers

32 retailers£4,338 GBP to £9,582 GBP

B+
Cheapest Retailer
-
£4,338 GBP
B+
Retailer 2
-
£4,438 GBP
View
B+
Retailer 3
-
£4,449 GBP
View
B+
Retailer 4
-
£4,527 GBP
View
B+
Retailer 5
-
£4,532 GBP
View
B+
Retailer 6
-
£4,589 GBP
View
B+
Retailer 7
-
£4,630 GBP
View
Retailer 8
-
£4,791 GBP
View
Price last confirmed 9 days ago
B+
Retailer 9
-
£4,791 GBP
View
Final sale: no returns
B+
Retailer 10
-
£4,808 GBP
View
B+
Retailer 11
-
£4,934 GBP
View
B+
Retailer 12
-
£5,091 GBP
View
B+
Retailer 13
-
£5,091 GBP
View
B+
Retailer 14
-
£5,104 GBP
View
B
Retailer 15
-
£5,191 GBP
View
B
Retailer 16
-
£5,271 GBP
View
B
Retailer 17
-
£5,288 GBP
View
B+
Retailer 18
-
£5,349 GBP
View
B+
Retailer 19
-
£5,369 GBP
View
B
Retailer 20
-
£5,376 GBP
View
B
Retailer 21
-
£5,376 GBP
View
B
Retailer 22
-
£5,678 GBP
View
B
Retailer 23
-
£5,753 GBP
View
B
Retailer 24
-
£5,753 GBP
View
B
Retailer 25
-
£5,774 GBP
View
B
Retailer 26
-
£5,830 GBP
View
B
Retailer 27
-
£5,901 GBP
View
B
Retailer 28
-
£5,947 GBP
View
B
Retailer 29
-
£5,990 GBP
View
B
Retailer 30
-
£6,991 GBP
View
B
Retailer 31
-
£7,985 GBP
View
Most Expensive
C
NZ Jewellers
f114e483-5814-48b5-9cb6-75a56426bb52 · Nov 5
£9,582 GBP
$12,826 USD
View
31 more retailers have this diamond
Prices start from £4,338 GBPSave up to £5,244 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
£4,338 GBP