Assertion: topaz | /r/HasAspect | perfect easybasal cleavage
Facets:
value: with a conchoidal fracture
type: OTHER
Source sentences:
text: Topaz has perfect (easy) basal cleavage in one direction (in the plane perpendicular to the c-axis), with a conchoidal fracture, therefor it is a difficult stone to set without fracturing.
text: Topaz has perfect (easy) basal cleavage in one direction (in the plane perpendicular to the c-axis), with a conchoidal fracture, therefor it is a difficult stone to set without fracturing.