preciousness vs preciosity

preciousness and preciosity both are nouns.

Word	Noun	Adjective	Verb	Adverb
preciousness	Yes	No	No	No
preciosity	Yes	No	No	No

As nouns, preciousness and preciosity are synonyms defined as:

preciousness and preciosity: the quality of being fastidious or excessively refined

preciousness (noun)	preciosity (noun)
the positive quality of being precious and beyond value	the quality of being fastidious or excessively refined
the quality of being fastidious or excessively refined
the quality possessed by something with a great price or value