Assertion: pyrite | /r/ObjectUse | used as a mineral detector
Facets:
value: in radio receivers
type: LOCATION
Source sentences:
text: During the early years of the 20th century, pyrite was used as a mineral detector in radio receivers, and is still used by crystal radio hobbyists.
text: During the early years of the 20th century, pyrite was used as a mineral detector in radio receivers, and is still used by 'crystal radio' hobbyists.
text: During the early years of the 20th century, pyrite was used as a mineral detector in radio receivers, and is still used by 'crystal radio' hobbyists.
text: During the early years of the 20th century, pyrite was used as a mineral detector in radio receivers, and to this day is so used by ‘crystal radio’ hobbyists.