Prima is a simple, muted, classic tile. It's understated and elegant beauty are evident in simple, even tones. Mica is an attractive, dark taupe. By nature, it's very neutral and extremely versatile. Use the bullnose tile to put a clean , professional edge on your newly installed tile. Prima is a simple, muted, classic tile. It's understated and elegant beauty are evident in simple, even tones. Mica is an attractive, dark taupe. By nature, it's very neutral and extremely versatile. Use the bullnose tile to put a clean , professional edge on your newly installed tile.