What can subsitute opal?

Answer:
One could suggest that there is simply no substitute for the color play of a top quality opal, although synthetic opals can look nice, Albertan ammolite can be quite spectacular, and color-play feldspars like labradorite or sunstone can be quite stunning.
First answer by Zantaz. Last edit by Zantaz. Contributor trust: 19 [recommend contributor recommended]. Question popularity: 2 [recommend question].