expensive or extravagant in appearance
opulent - luxurious
‘Opulent’ describes something characterized by luxury and the appearance of great wealth. The term is most commonly used to describe lavish surroundings, a way of life characterized by acquiring material things, or an ostentatious style of dress.
Since his big promotion, Peter has been enjoying quite an opulent lifestyle, flying first class and staying in the best hotels.
The function at the palace was spectacular. I’ve never seen such opulence!
Emily dressed opulently for the gala. She clearly wanted to make a big impression.