i would think the maker would have fitted the knife to the scabbard a bit better on the bejewelled one at least, if he's intended it to be at that angle, rather than leave that unsightly wedge shaped gap.
another thought, how is the tang held in the grip? if a thermal cutlers cement was used, high desert heat &/or sun may have softened the resin allowing the movement, which then hardened in more amenable temperatures.
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