Silver only appears at high altitude.

If you don't see any Stone Golems around, go higher. Once you see Golems, Silver should be easy to find with the Wishbone. Beware the Golems, though.. there are two types, and they both hit really hard. Even in a fully-upgraded Wolf set, they're capable of hitting you in the 40s or so. Parrying is key to killing them. The pointy bois are a bit easier to parry for me.

Personally, I skipped Bonemass and went straight to the Mountains for Silver-tier equipment, and found it using the Iron Sledge. Once you learn the terrain of the Mountains, where Silver typically appears, you'll have no trouble.

Furthermore, if you're lucky, you can often find the tips of Silver veins poking out from raised terrain near cliffs.