I have a few ounces of precipitate from various types of plating solution. I was told some were palladium and others rhodium. My question is does anyone know if rhodium shows clearly using the stannous chloride spot test? I brought some of the powder into aqua regia solution and am seeing a red color when performing the spot test. I usually see green for Pd, yellow orange to brown for Pt and purple to black for Au but never saw this red. Thanks