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1.51ct H I1 Round Natural Diamond

EX • H/I1 • GIA 7508226533

Shape and cutting style on the report: Round

Certificate GIA 7508226533

Diamond specifications and retailer prices

From £3,623 GBP
$4,855 USD
As of November 1, 2026
Save £4,047 GBP (53%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £7,670 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and I1 clarity (included), with a top-tier cut grade and certified by GIA 7508226533. Listed at 10 retailers as of October 30, 2026, with prices from £3,623 to £7,670, a £4,047 spread on the same certified stone. NZ Jewellers lists it at £7,670. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
H
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 7508226533
Dimensions7.27 × 7.33 × 4.55 mm
L/W Ratio1.01
Star length45%
Lower girdle80%
Cert comments
Clouds are not shown. Surface graining is not shown.
Key to symbols
Feather, Crystal, Needle
Top View
7.27 mm7.33 mm1.51 ctH / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7508226533
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.4%

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 1
Current: £7,670 GBP|Low: £3,612 GBP|High: £7,670 GBP|Avg: £4,882 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 5£3,623 GBP
Retailer 6£3,661 GBP
Retailer 4£3,985 GBP
Retailer 7£4,155 GBP
Retailer 3£4,441 GBP
Retailer 11£4,441 GBP
Retailer 10£4,590 GBP
Retailer 2£4,989 GBP
Retailer 8£5,467 GBP
Retailer 9£7,408 GBP
NZ Jewellers£7,670 GBP

20 data points across 11 retailers

10 retailers£3,623 GBP to £7,670 GBP

B+
Cheapest Retailer
-
£3,623 GBP
$4,855 USD
B+
Retailer 2
-
£3,661 GBP
$4,905 USD
View
B+
Retailer 3
-
£3,985 GBP
$5,339 USD
View
B
Retailer 4
-
£4,155 GBP
$5,567 USD
View
B
Retailer 5
-
£4,155 GBP
$5,567 USD
View
B
Retailer 6
-
£4,441 GBP
$5,950 USD
View
B
Retailer 7
-
£4,441 GBP
$5,950 USD
View
B
Retailer 8
-
£4,590 GBP
$6,150 USD
View
B
Retailer 9
-
£4,989 GBP
€6,366 EUR
View
Most Expensive
B
NZ Jewellers
c68ad40d-a6b9-40d0-a625-a7e781f9967a · Oct 30
£7,670 GBP
$10,277 USD
View
9 more retailers have this diamond
Prices start from £3,623 GBPSave up to £4,047 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 Round
£3,623 GBP