... hundred kinds, like red agate, Indian agate, turquoise, semi-precious stone, rose quartz, amethyst, quartz, green aventurine, tiger's eye, ... picture jasper, green piebald stone, gold sand stone, red quartz, spotted stone, purple fluorite, white turquoise and alabaster, etc ... imperfection because no one is perfect, let alone the gem formed billions of years ago. Please understand