Assertion: tourmaline's color | /r/HasProperty | green or brownish green
Facets:
Source sentences:
text: Epidote or Pistacite is a silicate of lime, alumina, and iron, and water; color, usually yellowish-green or brownish green, sometimes black, yellow, red, gray, white; powder, white or gray; luster, glassy; H = 6 to 7; G = 3.25 to 3-5; cleavage, perfect.