It is so difficult to know how to treat an onyx like this. There are a multitude of strata in all sorts of different colours. The overall effect is wonderful but overwhelming. The stone is saying so much I have concluded that it is best to try something very simple. This material also presents technical difficulties as its strata are also fault lines which can split at any time. Although this would spell disaster in a clean coloured marble I am not overly concerned about gluing this stone together as any glue marks are lost in the overall mayhem of colour and fault lines. The stone also varies enormously in its hardness and is therefore tricky to get smooth. Apart from the above however it is a delight. I found it last time I was in Italy and thought it would be fun to try it out. You don’t get much sense of the colours in this picture but just wait until it is polished!