We all know Steven's fusions have unusual "weapons", Smoky has a yo-yo, Rainbow a parasol and Sunstone suction cups (for some reason). But did Rose's fusions have the same?
Note: Let's forget Obsidian for the moment because we know [both versions had a sword]. But she doesn't realy have her own personality unlike the others.
There is still some debate on whether Rose's version of Smoky Quartz existed, but if she did, she could have had a different weapon. in "Know Your Fusion" Pearl asked Steven and Amethyst if Smoky's yo-yo works like a "lasso or a flail", if Rose's Smoky existed she would have known what the weapon was like. But then again, it could be Rose never fused with Amethyst separately, but if they did, maybe this Smoky had a flail instead of a yo-yo.
Prior to "Change Your Mind", I speculated that Rainbow Quartz's weapon might have been a rapier, with the spear making the blade and handle but with the shield making the guard. This makes sense because both Pearl and Rose are skilled with swords and during "It's Over Isn't It" when Pearl says "fusion" she mimes swinging a sword. Granted it could be RQs parasol can be used as a sword, but who knows?