What To Do About A Dull Marble

[flyball]

Hello, I have a wonderful looking marble (actually I collect them for inspiration for paintings along with - the 'I just love them'- factor)

But it is definately dull on the surface. I am not sure of age etc. but can anyone suggest a way to liven a marble up on it's surface with out reducing any value that may be there? ( I will likely sell the marble either with or without the painting, once done)

Thanks!

[Steph]

Water or oil can temporarily do the trick.

[lstmmrbls]

floor shine products can be a longer fix. Also a vase full of water(add a little bleach to keep clear) is a great place to keep dull and dinged marbles as the water usually makes them look new again!!

[flyball]

Thanks!