Ok...

Ash Key
Keep the fire going for about 40 hrs on fast speed. Sparkles will start to show up. Have villagers go to the little water fall where they get drinks and all that stuff. they will put the fire out but keep putting water on it until the gem is cool enough to pick up.

Clam Key

You need the statue puzzle solved. After the statue is togethor, an oddly shaped pearl will appear by its feet. Get a master builder to take it to the waterfall.

Hope this helps!