Assertion: antimony | /r/HasProperty | mercury
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: Color, grayish or grayish black; powder, grayish or grayish black, sometimes inclining to brown or reddish; luster, metallic; H = 3 to 4; G=4.4 to 5.1; no cleavage; composition, about 52% copper, and, in addition to the antimony and sulphur, sometimes mercury or silver, also zinc and iron; weathers to a yellowish coating.