Assertion: opal's host material | /r/HasProperty | rhyolitic
Facets:
Source sentences:
text: Mexican opals are sometimes cut in their rhyolitic host material if it is hard enough to allow cutting and polishing.
text: Mexican opals are sometimes cut in their rhyolitic host material if it is hard enough to allow cutting and polishing.
text: Mexican opals are sometimes cut in their rhyolitic host material if it is hard enough to allow cutting and polishing.
text: Mexican opals are sometimes cut in their rhyolitic host material if it is hard enough to allow cutting and polishing.