Botticino Fiorito marble with cracks

i would try to mix a small amount of clear epoxy mix with matching marble dust, if you can locate dust some can be made by grinding a tile on a grinding wheel an collecting dust in a vacumm, i try a very small area 1st, remember that epoxy drys extremely fast an very hard to polish, you will have to acheive a finish about as you go,you can only work small area s at a time , but be sure to get a white or clear color as most epoxies come in black or grey, hope this is helpful.

David Fuller.