Would this be called a cassolette

[cprice7369]

[mforjan]

"Cassolette (from the diminutive form of the French word cassole, a small container) may refer to: A small porcelain, glass, or metal container used for the cooking and serving of individual dishes."

It looks like an urn.

[maxine*j]

May OP consulted an old dictionary.  This is from the 1913 edition of Webster's Dictionary, which is on-line because its copyright has expired and it is now in the public domain:

" || Cas`so*lette" (?), n. [F.] a box, or vase, with a perforated cover to emit perfumes."

I have never heard that use, mind you, but  I'm just speculating on where OP might have got the term.

 Like you, I'd just call it an URN, on a footed marble base.