Flat and freeform Plume Agate. It is good on both sides, so you will be able to choose the best look for the front or do a border wrap so that you can keep it great both fron and back :D)
There is a terrific white plume that leads to burnished red and then black and grey and then carmel. Being freeform, the natural indentations and polyps were left and polished as well giving it great character.
Measures 39mm x 28mm by 6mm deep
Priced for 1 cabouchon