Wondrous Item, uncommon
This red corundum contains a mote of elemental energy. When you use an action to break the gem, a fire elemental is summoned as if you had cast the conjure elemental spell, and the gem's magic is lost.
Notes: Summoning
hi
hi
Ah yes i think i know you
Do normal concentration rules apply when using the magic item? Or is there no fear of losing control of the elemental?
edit: It would feel weird, that a fighter could use the gem to summon an elemental and concentrate on keeping control of it, without any knowledge of magic and the prior experience of concentrating on spells