A rare indoor plant that comes from South America, with its unique black colors, this cactus will spruce up your dull tables and windowsills. Grafted Moon Cactus Black also known as Gymnocalycium mihanovichii var. friedrichii Black, is a beautiful perennial cactus that thrives best in Indian climates. These beginner-friendly cacti love to be in sunny spots and warm environments. Simply let the cactus soak up the sun, water it when the soil is dry, and watch it thrive.