Colours and markings vary between crystals. You are purchasing the Fluorite crystal heart, pictured (has rainbows).
About Fluorite Crystal Hearts
Fluorite is a very protective crystal. It draws off negative energies and stress, eases worrying thoughts and fears. This crystal helps you see the bigger picture.
Fluorite is a great crystal for improving concentration and focus.
Fluorite crystal is said to physically help sinusitis, colds and flu. Fluorite may also help to relieve arthritis and joint pain.