Assertion: cristobalite | /r/HasAspect | no gem significance
Facets:
Source sentences:
text: Cristobalite has no gem significance but appears in some types of volcanic glass as white globules and crystals resembling snowflakes.
text: Tridymite and cristobalite have no gem significance; except that the “snowflakes” sometimes found in obsidian are cristobalite.