I don't often do bling-heavy nails. A rhinestone here and there to add some sparkle is usually enough for me. But I recently got an order from MoYou London, and there were rhombus shaped rhinestones, and I couldn't help myself:
The base polish is Careline Flamingo.
Oddly enough, I've tried doing something similar with rhombus shaped gluquins, but it was much more difficult. They're approximately the same size, so I wonder why that is!