Assertion: cesium's number | /r/MadeOf | significant amounts of cesium
Facets:
Source sentences:
text: A number of minerals contain significant amounts of cesium, including mica, beryl, feldspar, petalite, and pollucite, which is the mineral it is usually mined from.
text: A number of minerals contain significant amounts of cesium, including mica, beryl, feldspar, petalite, and pollucite, which is the mineral it is usually mined from.