Question: I was wondering what is the difference between a black opal and a black crystal opal? Beth
Response: Black opal is opal that is black or very dark when viewed from the top face. It is normally thought of as being similar to black onyx (you can't see through black onyx) with a lot of bright color (red, blue, green, yellow, orange, or a mixture) coming from the stone (Play of Color). Black Crystal Opal is also Black or very dark when viewed from the top face, and also has the bright play of color, but it is also translucent (you can see through it when you hold it up to a light source). Terry
