Assertion: obsidian | /r/HasProperty | smooth
Facets:
value: even microscopically
type: DEGREE
Source sentences:
text: It has teeth, whereas obsidian is smooth even microscopically.
text: Obsidian, naturally occurring volcanic glass, is smooth, hard, and far sharper than a surgical scalpel when fractured, making it a highly desired raw material for crafting stone tools for most of human history.
text: Obsidian, naturally occurring volcanic glass, is smooth, hard, and far sharper than a surgical scalpel when fractured, making it a highly desired raw material for crafting stone tools for most of human history.