Radiant|Natural|GIA

1.51ct H SI1 Radiant Natural Diamond

VG • H/SI1 • GIA 1557154271

Certificate GIA 1557154271

Diamond specifications and retailer prices

From £3,482 GBP
As of November 4, 2026
Save £3,012 GBP (46%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £7,373 GBP at NZ Jewellers · As of October 6, 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 1557154271. Listed at 25 retailers as of November 1, 2026, with a 87% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1557154271
Dimensions7.35 × 5.83 × 4.00 mm
L/W Ratio1.26
Culet sizeNone
Top View
7.35 mm5.83 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1557154271
Side View
Table 69.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £7,373 GBP|Low: £3,379 GBP|High: £7,373 GBP|Avg: £4,892 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
November 7, 2026
Retailer 13£3,685 GBP
Retailer 4£3,743 GBP
Retailer 11£3,994 GBP
Retailer 5£4,029 GBP
Retailer 6£4,131 GBP
Retailer 12£4,227 GBP
Retailer 2£4,258 GBP
Retailer 3£4,608 GBP
Retailer 7£4,790 GBP
Retailer 8£5,378 GBP
Retailer 9£6,495 GBP
Retailer 10£7,145 GBP
NZ Jewellers£7,373 GBP

31 data points across 13 retailers

25 retailers£3,482 GBP to £6,495 GBP

A
Cheapest Retailer
-
£3,482 GBP
A
Retailer 2
-
£3,685 GBP
View
Final sale: no returns
A
Retailer 3
-
£3,717 GBP
View
A
Retailer 4
-
£3,743 GBP
View
B+
Retailer 5
-
£3,949 GBP
View
Retailer 6
-
£3,994 GBP
View
Price last confirmed 9 days ago
B+
Retailer 7
-
£3,994 GBP
View
Retailer 8
-
£3,994 GBP
View
Price last confirmed 16 days ago
B+
Retailer 9
-
£4,029 GBP
View
A
Retailer 10
-
£4,131 GBP
View
B+
Retailer 11
-
£4,227 GBP
View
B+
Retailer 12
-
£4,258 GBP
View
B+
Retailer 13
-
£4,296 GBP
View
B+
Retailer 14
-
£4,296 GBP
View
B+
Retailer 15
-
£4,438 GBP
View
B+
Retailer 16
-
£4,521 GBP
View
Retailer 17
-
£4,608 GBP
View
Price last confirmed 29 days ago
Retailer 18
-
£4,608 GBP
View
Price last confirmed 17 days ago
B+
Retailer 19
-
£4,790 GBP
View
Retailer 20
-
£4,862 GBP
View
Price last confirmed 23 days ago
B
Retailer 21
-
£5,378 GBP
View
B
Retailer 22
-
£6,495 GBP
View
Retailer 23
-
£7,145 GBP
View
Price last confirmed 10 days ago
Retailer 24
-
£7,373 GBP
View
Price last confirmed 17 days ago
Most Expensive
NZ Jewellers
8be071d4-8e55-4112-a1c0-9c595306d580 · Oct 6
£7,373 GBP
$9,869 USD
View
Price last confirmed 31 days ago
24 more retailers have this diamond
Prices start from £3,482 GBPSave up to £3,012 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.

A
1.51ct Radiant
£3,482 GBP