Assertion: onyx's color | /r/HasProperty | black
Facets:
value: usually
type: DEGREE
Source sentences:
text: Onyx comes mainly in three colors (or color combinations): black, black and white, and grey and white.
text: The seven colors of Haft Rang tiles were usually black, white, ultramarine, turquoise, red, yellow and fawn.
text: It has a fine texture and black color.