This pendant reminds me of an easter egg for some reason! Does anyone else see that? :) Dendrite opal is an interesting stone to me. No two stones will be alike, all the inclusions and patterns vary from stone to stone. This stone is said to help balance oneself while the black onyx is a powerful grounding stone. Such a great combination! This large sterling silver piece features an almost black patina to enhance the bluish white of the opal. It is 1.25" wide and almost 2" long. It comes on an 18" leather necklace. Different length necklace can be accommodated. Please contact me to request.