Where to find two moonstones?

Question

Need to know were I can get two moonstones I looked all over the place if you could help I would be thankful

Answer 1

HG/SS:
Mom will buy you one.
Ruins of Alph bottom right
Mt. Moon on Mondays
Tohjo Falls

Pokewalker:

Volcano Path 5000+ Steps
Nights Sky Edge 5000+ Steps
Amity Meadow 2000+ Steps

Diamond/Pearl:
The Underground

All: Wild Clefairy, Cleffa, and Lunatone.