Oval|Natural|GIA

1.50ct I SI1 Oval Natural Diamond

EX • I/SI1 • GIA 3545321774

Certificate GIA 3545321774

Diamond specifications and retailer prices

From £3,307 GBP
As of November 4, 2026
Save £3,399 GBP (51%) vs most expensive(unlock to see where)
30 retailers carry this diamond
Most expensive: £7,633 GBP at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

About this 1.5ct natural oval diamond

This 1.5ct natural oval sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 3545321774. Listed at 30 retailers as of November 4, 2026, with a 103% 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.07°
Pavilion angle39.73°
OriginNatural
Grading LabGIA
CertificateGIA 3545321774
Dimensions8.87 × 6.39 × 4.02 mm
L/W Ratio1.39
Top View
8.87 mm6.39 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3545321774
Side View
Table 60.0%Crown 40.07°Girdle: MED-THKPavilion 39.73°Culet: NoneDepth 62.8%

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 4
Current: £4,959 GBP|Low: £3,307 GBP|High: £6,805 GBP|Avg: £4,590 GBP|+2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 8£3,307 GBP
Retailer 3£3,708 GBP
Retailer 12£3,816 GBP
Retailer 4£3,870 GBP
Retailer 9£4,135 GBP
Retailer 11£4,135 GBP
Retailer 5£4,335 GBP
Retailer 10£4,376 GBP
Retailer 2£4,535 GBP
Retailer 1£4,959 GBP
Retailer 6£5,568 GBP
Retailer 7£6,705 GBP

40 data points across 12 retailers

30 retailers£3,307 GBP to £6,705 GBP

A
Cheapest Retailer
-
£3,307 GBP
A
Retailer 2
-
£3,606 GBP
View
A
Retailer 3
-
£3,616 GBP
View
A
Retailer 4
-
£3,708 GBP
View
A
Retailer 5
-
£3,816 GBP
View
Final sale: no returns
A
Retailer 6
-
£3,870 GBP
View
B+
Retailer 7
-
£4,085 GBP
View
Retailer 8
-
£4,135 GBP
View
Price last confirmed 45 days ago
Retailer 9
-
£4,135 GBP
View
Price last confirmed 21 days ago
Retailer 10
-
£4,135 GBP
View
Price last confirmed 15 days ago
Retailer 11
-
£4,135 GBP
View
Price last confirmed 12 days ago
Retailer 12
-
£4,135 GBP
View
Price last confirmed 29 days ago
B+
Retailer 13
-
£4,135 GBP
View
B+
Retailer 14
-
£4,335 GBP
View
B+
Retailer 15
-
£4,376 GBP
View
B+
Retailer 16
-
£4,438 GBP
View
B+
Retailer 17
-
£4,438 GBP
View
Retailer 18
-
£4,535 GBP
View
Price last confirmed 33 days ago
B+
Retailer 19
-
£4,587 GBP
View
B+
Retailer 20
-
£4,678 GBP
View
Retailer 21
-
£4,771 GBP
View
Price last confirmed 45 days ago
Retailer 22
-
£4,771 GBP
View
Price last confirmed 16 days ago
B+
Retailer 23
-
£4,771 GBP
View
Retailer 24
-
£4,771 GBP
View
Price last confirmed 14 days ago
B+
Retailer 25
-
£4,959 GBP
View
B+
Retailer 26
-
£5,568 GBP
View
B
Retailer 27
-
£6,705 GBP
View
Retailer 28
-
£7,633 GBP
View
Price last confirmed 17 days ago
Retailer 29
-
£7,633 GBP
View
Price last confirmed 14 days ago
Most Expensive
NZ Jewellers
dfeb4df0-b816-4860-8afe-396cfdcda81c · Sep 19
£7,633 GBP
$10,217 USD
View
Price last confirmed 47 days ago
29 more retailers have this diamond
Prices start from £3,307 GBPSave up to £3,399 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 Oval
£3,307 GBP