Ball-bearings.
fossils are not metallic minerals. marbles are non metallic minerals.
steelie
A metallic playing marble is a type of marble made of metal instead of glass or clay. These marbles can have a shiny or reflective surface and are often used in traditional marble games or collections.
He will have 13 blue marbles and 10 green marbles.
10 Green marbles, 13 Blue marbles.
He has 10 green marbles.
There could be 12 white marbles and 16 red marbles
at least 39 blue marbles
8:6
12 blue marbles
12 blue marbles
24 red marbles