Today I have another bit of gorgeousness from my swap with Lucy in Brazil: Ludurana Aurora Magnetic in the shade called Explosão de Luz. This is a blue/purple magnetic duochrome shimmer, and as if that weren't enough, it's also scented, giving off a light floral fragrance when dry.
The color shift is clearly visible in the bottle:
I used two coats of this, no topcoat, and left one finger unmagnetized so I could see how it looked plain. It was more silvery that I expected based on the bottle; the stripes left by the magnet alternated bottle color and a silver/pewter. The magnet is glued to the cap, and the pattern isn't marked on it, so to keep the stripe direction somewhat consistent I just had to pay attention to the writing on the label and orient that the same way.
The color did indeed shift on my nails, so much so I'd call this a multichrome rather than just a duochrome. I saw the blue and purple from the bottle, plus the blue shifted to teal and the purple to plum/dark pink depending on how the light was hitting my nails. Sometimes, each nail looked different. I took many oddly angled shots of this trying to capture it and only partly succeeded. Here's a sampling:
This is such an interesting and beautiful polish. I need to wear it as a full mani soon.