13 cm Hand painted - Black marble
Before using black for the marble designs, I only went towards brighter colours, with white on the background.
Black made these look like a mixture of fire and universe, or as a close-up to a planet. They're all unique and fascinating, and allows you to play with your imagination.
Note: Even thought they're made with the same paint, there will not be 2 the same!!1 in a million? Yes, please!