underground i guess
Talk to Cynthias grandmother and find the stone that she tells you to find in mt. Coronet then go to spear pillar.
go to Mt. Coronet
To find a shiny stone in platinum you have to dig in the underground tunnel.
sphere pillar.
you find arcues
go back to spear pillar
in spear pillar of course
find orbs in the road to spear pillar
Get to the top of Spear pillar with the azure flute.
stone pillar after beating Cyrus
on route 225 there will be a dawn stone
in the underground