without seeing these initial marks we really are just talking in circles. Your description is also quite vague which doesn't help, sorry.
All we can ascertain really is the caratage which is the 585 number. This number is the gold purity, the fineness, and tells you the metal is comprised of 14K gold. Which is quite common.
Stan, can you tell, what material the cameo is made from? Shell, plastic, hard-stone or are you concerned, the cameo is made from composite material (which is also quite common).
Stan, the subject on the cameo, you didn't mention; a ladies head & shoulders in profile? Or is the subject an astonishing Greek mythological subject, which indicates an antique cameo, which are usually more valuable.
