The phrase "an object of passion" is correct and usable in written English.
It can be used to describe something or someone that evokes strong feelings or desires, often in a romantic or intense context.
Example: "For many artists, their work becomes an object of passion that drives their creativity and inspiration."
Alternatives: "a subject of desire" or "a focus of affection".
Throughout its short life, the museum has been an object of passion for a small group of benefactors who have paid for its building and two additions and have bolstered its endowment and donated acquisition funds.
While the tech world clearly makes tools that the whole world can use, it's rare that tools become an object of passion outside of the technology community.
Among GM's senior executives, the concept of an automobile morphed slowly from being an object of passion to being merely a means to success and power.
Sobhraj had made himself an object of passion to a Canadian medical secretary he met in Rhodes, Greece a woman named Marie-Andrée Leclerc, who was vacationing with her fiancé.
Chocolate was both an object of her passion and the focus of her connoisseurship.
A sonnet is addressed to an indifferent object of passion; even if the actual lover warms up, the sonneteer can't become too easily complacent — a dark lady suddenly sunny produces no one's idea of a poem.
Frumpy, 40-ish, depressed about her flagging career, she's an odd object of passion for the emotionally stunted philistine played by Mr. Bacri.
We have, he suggests, little or no idea of God whatsoever, and this limits our capacity to regard God as either an object of belief or passion.
The place is idyllic, but Iliana, now an object of reverence rather than passion, is restless.
He also shows how the sundry couplings constantly lead to remorse, regret, a puzzled tristesse or a brutal indifference to the object of passion.
Nor is romance missing, for true love is preferred to a hundred concubines, even if the object of passion has originally been bought as a slave.
