The phrase "a striking aspect" is correct and usable in written English.
It can be used to highlight a notable or impressive feature of something being discussed.
Example: "One striking aspect of the painting is its vibrant use of color, which draws the viewer's attention immediately."
Alternatives: "a notable feature" or "an impressive element".
A striking aspect of the film is its lack of a male hero.
A striking aspect of the rulings is the extent to which they reflect public opinion.
A striking aspect of the struggle for gay rights was the way it mirrored the struggle against racism.
A striking aspect of the 1976 Presidential primaries is how little they reflect the events of the country's recent past.
A striking aspect of this type of combustion is a broadening of the limits of flammability due to the accelerating effect of temperature increases on chemical reaction rates.
A striking aspect of the decline of the Golden Triangle is the role China has played in pressing opium-growing regions to eradicate poppy crops.
A further striking aspect of the present results is the convergence between face preferences displayed by the newborns of two distant vertebrate species.
For anyone who has followed the case, one striking aspect is how late an actual indictment has come, and after a huge number of accusations.
The second instantly striking aspect of the performance -- and, fortunately, a fleeting one -- was that because Tully's sound is so dry compared with that of the grand chapel sound the choir is used to that it took the singers a few moments to adjust.
The latter is probably the most obviously striking aspect of Octopath Traveler, as it uses a side-on "HD-2D" approach to the visuals, while also retaining a classic pixel art style.
Another striking aspect of the novel is the strange absence of sexuality: a couple of dozen young people are living in close quarters in the middle of nowhere and – apart from an inconclusive flirtation between Richard and Françoise – there is almost no sex.
