If the silver fittings can be removed without harming the sword, the non-silver item remains separately deliverable. In that case, the silver part fails for lack of sarf receipt, while the sword sale can remain valid for its allocated consideration.
The controlling distinction is not relative market value but whether the subject can be legally separated and delivered intact.
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Where the ornament detaches harmlessly
Bab al-Sarf: Precious-Metal Exchange, Possession and Composite Goods
If the silver fittings can be removed without harming the sword, the non-silver item remains separately deliverable. In that case, the silver part fails for lack of sarf receipt, while the sword sale can remain valid for its allocated consideration.
The controlling distinction is not relative market value but whether the subject can be legally separated and delivered intact.