Need assistance to see if marbles are vintage, collectable

[Curiocaravan]

Hi

 

i know nothing about marbles at all except remembering playing them as a kid in the 70s.

 

I purchase a bill lot of items and there are a bunch of marbles.  This is one example

 

it weighs approximately 18g

is approx 8.5cm diameter (my clippers arm working at moment)

 

can anyone advise if this one is anything or just a plain ol marble.

 

thanks in advance 

[Chad G.]

Cat eye

[Parmcat]

Plain common Catseye.