This stupendous piece of black obsidian as it stands is fantastic but it has hidden depths too - when a light source is pointed at its middle it has layers of slate blue and grey green rainbows in its belly.
This is a really special piece to look at, and also it feels really lovely.
It measures about 18cm high x 13.3cm wide x 5.5cm deep.
Please check the size and photos very closely before you buy, as you can see this a very precious one.