Crossword Puzzle Pumice source

Clue: Pumice source

Source of pumice (LAVA with 4 letters)
Source of mother-of-pearl (e.g. ABALONE with 7 letters)
Source of current buzz (TOPICALSUBJECT with 14 letters)
Use as a source (DRAWUPON with 8 letters)
Musicians covered by The Source and XXL (MCS with 3 letters)
Niagara River's source (ERIE with 4 letters)
Edelweiss source (ALPS with 4 letters)
Protein source from California (WALNUT with 6 letters)
James Hilton novel that's the source of the term "Shangri-La" (LOSTHORIZON with 11 letters)
Acorn's source (OAK with 3 letters)