Assertion: chalcedony | /r/HasProperty | turned red
Facets:
value: by heating
type: CAUSE
Source sentences:
text: Almost any chalcedony can be turned red by heating in an oven since it contains finely disseminated iron compounds that are oxidized by heating.
text: Natural carnelian is found in Brazil, India, Scotland, Uruguay and Washington state in the U.S., but almost any chalcedony can be turned red by heating, which causes oxidation of its finely disbursed iron compounds.
text: Almost any chalcedony can be turned red by heating in an oven since it contains finely disseminated iron compounds that are oxidized by heating.
text: Almost any chalcedony can be turned red by heating in an oven since it contains finely disseminated iron compounds that are oxidized by heating.