Round|Natural|GIA

1.50ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 7478417499

Certificate GIA 7478417499

Diamond specifications and retailer prices

From £4,255 GBP
As of November 1, 2026
Save £3,731 GBP (47%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £9,585 GBP at NZ Jewellers · As of September 26, 2026
View at NZ Jewellers

About this 1.5ct natural round diamond

This 1.5ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7478417499. Listed at 25 retailers as of November 1, 2026, with a 88% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.50
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 7478417499
Dimensions7.23 × 7.28 × 4.52 mm
L/W Ratio1.01
Star length50%
Lower girdle70%
Girdle conditionFaceted
Cert comments
Additional clouds are not shown. Pinpoints are not shown.
Key to symbols
Feather
Top View
7.23 mm7.28 mm1.50 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7478417499
Side View
Table 59.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
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 1
Current: £5,313 GBP|Low: £3,777 GBP|High: £8,083 GBP|Avg: £5,499 GBP|-0.1%
Retailer 1
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
November 6, 2026
Retailer 12£4,255 GBP
Retailer 13£4,533 GBP
Retailer 5£4,792 GBP
Retailer 2£4,793 GBP
Retailer 11£4,808 GBP
Retailer 10£5,289 GBP
Retailer 1£5,313 GBP
Retailer 4£5,378 GBP
Retailer 14£5,525 GBP
Retailer 6£5,753 GBP
Retailer 3£5,776 GBP
Retailer 8£6,091 GBP
Retailer 7£6,992 GBP
Retailer 9£7,986 GBP

39 data points across 14 retailers

25 retailers£4,255 GBP to £7,986 GBP

A
Cheapest Retailer
-
£4,255 GBP
B+
Retailer 2
-
£4,450 GBP
View
B+
Retailer 3
-
£4,527 GBP
View
B+
Retailer 4
-
£4,533 GBP
View
B+
Retailer 5
-
£4,589 GBP
View
B+
Retailer 6
-
£4,808 GBP
View
B+
Retailer 7
-
£5,104 GBP
View
Retailer 8
-
£5,192 GBP
View
Price last confirmed 36 days ago
Retailer 9
-
£5,259 GBP
View
Price last confirmed 14 days ago
Retailer 10
-
£5,272 GBP
View
Price last confirmed 38 days ago
B+
Retailer 11
-
£5,289 GBP
View
Retailer 12
-
£5,289 GBP
View
Price last confirmed 23 days ago
Retailer 13
-
£5,289 GBP
View
Price last confirmed 35 days ago
B+
Retailer 14
-
£5,313 GBP
View
B+
Retailer 15
-
£5,378 GBP
View
Retailer 16
-
£5,525 GBP
View
Price last confirmed 15 days ago
B+
Retailer 17
-
£5,753 GBP
View
B+
Retailer 18
-
£5,753 GBP
View
B+
Retailer 19
-
£5,776 GBP
View
B+
Retailer 20
-
£5,947 GBP
View
Retailer 21
-
£5,990 GBP
View
Price last confirmed 38 days ago
B+
Retailer 22
-
£6,091 GBP
View
B
Retailer 23
-
£6,992 GBP
View
B
Retailer 24
-
£7,986 GBP
View
Most Expensive
NZ Jewellers
971b4a7f-aa71-426e-a8e1-f21f5d602583 · Sep 26
£9,585 GBP
$12,829 USD
View
Price last confirmed 40 days ago
24 more retailers have this diamond
Prices start from £4,255 GBPSave up to £3,731 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
1.50ct Round
£4,255 GBP