Assertion: solid opal | /r/UsedFor | refer to stone
Facets:
Source sentences:
text: Solid Opal refers to stones consisting wholly of Precious Opal, while thin, but beautiful layers are sometimes made into doublets (with a supportive backing), or triplets (having a backing and a crystal dome over the top for protection).
text: Solid Opal refers to stones consisting wholly of Precious Opal, while thin, but beautiful layers are sometimes made into doublets (with a supportive backing), or triplets (having a backing and a crystal dome over the top for protection).