Silver Ore is one of the new ores added by the Soul Forest Mod. Silver ore can be found in the overworld together with a few of the other Soul Forest Mod's ores. Silver Ore is a tier 2 ore and can be mined easily with a iron pickaxe or better. It can usally be found in large veins underneath layer 26 in any overworld biome.
Silver Ore can easily be smelted into a Silver Ingot in a regular furnace.