Atlas Amulets are an alchemy ingredient. They are used in only one formula.
Only one merchant sells Atlas Amulets; the Rogue in the inn in Nobilia that teaches the Atlas formula sells one for 100 Jewels, then charges an additional 50 Jewels for each subsequent Amulet bought. However, he only sells Amulets until the player has three, then does not appear again until they have less than three. This makes it impossible to keep a good stock of Atlas Amulets, as the player will almost never have more than three at a time.
Acid Rain - Atlas - Barrier - Call Up - Corrosion - Crush - Cure - Defend - Double Drain - Drain - Energize - Escape - Explosion - Fireball - Fire Power - Flash - Hard Ball - Heal - Lance - Laser - Levitate - Lightning Storm - Miracle Cure - Nitro - One Up - Reflect - Regrowth - Revealer - Revive - Slow Burn - Speed - Sting - Stop - Super Heal