Assertion: orthoclase | /r/HasProperty | gemstone
Facets:
Source sentences:
text: Orthoclase as a mineral is a very common feldspar, but when described as a gemstone it usually refers to a rare transparent yellow or pink form of the mineral orthoclase.
text: Orthoclase as a mineral is a common feldspar, but when described as a gemstone it refers to a rare transparent yellowish form of the mineral Sanidine that is found in Madagascar.