Gemstone Array
{4}
Artifact
Oracle Text
{2}: Put a charge counter on this artifact.
Remove a charge counter from this artifact: Add one mana of any color.
Watch Out
Mana abilities don't use the stackRules Note
If this card's activated ability produces mana and doesn't target, it's a mana ability. Mana abilities resolve immediately without using the stack — opponents can't respond to them. However, abilities that target (even if they produce mana) aren't mana abilities.