Doubt if you will have much luck, Dutch. The silver carbonates in the San Juan area mostly just clogged up the prospector's pans. Getting the gold out took some processing. You'd be better off over on the South Park side where they dredged.
But, if it keeps the kids busy, go for it!
Skip Luke
Switchman (ret): Grand Canyon Railway;
Engineer (ret): Georgetown Loop RR Inc., Sumpter Valley Ry., Monticello & Sangamon Valley;
Dispatcher(ret): Illinois Central, White Pass & Yukon, Burlington Northern Ry.
Mariner, Musician, Miner