Though, to second guess myself, you guys have a point that 'crushing the sapphire' might be what they mean by destroy. My apologies for missing that bit.
AD
Compare to Simulacrum
Components: V, S, M (snow or ice in quantities
sufficient to made a life-size copy of the duplicated
creature; some hair, fingernail clippings, or other
piece of that creature’s body placed inside the snow
or ice; and powdered ruby worth 1,500 gp, sprinkled
over the duplicate and consumed by the spell)
clearly, there is language to say that the spell makes it go away.
I suspect the intention was to make it a 1000gp insta-summon. However, it is so niche it makes me really think it might be fine. They already constrain it by weight, it's a rare slot, etc etc etc.