Assertion: powdered gypsum | /r/HasAspect | unusual property
Facets:
Source sentences:
text: In contrast to most minerals, which when rehydrated simply form liquid or semi-liquid pastes, or remain powdery, calcined gypsum has an unusual property: when mixed with water at normal (ambient) temperatures, it quickly reverts chemically to the preferred dihydrate form, while physically "setting" to form a rigid and relatively strong gypsum crystal lattice:
text: In contrast to most minerals, which when rehydrated simply form liquid or semiliquid pastes, or remain powdery, calcined gypsum has an unusual property.