Assertion list
obsidian (primary) → HasA
Results from Ascent++: 5
obsidian → HasA → patterns of gas bubbles 0.38
obsidian → HasA → a hardness of 5 0.29
obsidian → HasA → specific gravity of 2.35 0.29
obsidian → HasA → low water content 0.25
obsidian → HasA → fascinating properties 0.16