Can You Get an Ice Stone in Pokemon SoulSilver?
No, you have to trade to get a Glacion
The ice rock does not exist in SoulSilver. The ice rock in Diamond and Pearl was used to train an Eevee into a Glaceon, but it does not exist in SoulSilver. Remember, SoulSilver is a remake of the original Silver, and because there was no ice rock in the original silver game, there isn't one in SoulSilver.