Answer:

MINERAL

AnswerCrossword Clue
MINERALTwenty Questions category
MINERALIron or iodine
MINERALTwenty Questions classification
MINERAL20 Questions category
MINERALTwenty Questions choice
MINERALAnimal or vegetable alternative
MINERALNeither animal nor vegetable
MINERALFeldspar, e.g.
MINERALVitamin partner
MINERALQuartz, for one
MINERALQuartz or feldspar
MINERALInorganic
MINERALInorganic substance.
MINERALInorganic.
MINERALPitchblende is a rare one.
MINERALCategory for "Twenty Questions."
MINERALThe kingdom of coal.
MINERALGraphite, for instance.
MINERALCategory of substances.
MINERALQuartz.
MINERALHematite or calcite.
MINERALOne of three kingdoms.
MINERALGold, for one.
MINERALValuable food element.
MINERALOne of the three kingdoms.
MINERALUranium.
MINERALInorganic matter.
MINERAL... water.
MINERALDiamond or quartz.
MINERALOne of a basic trio.
MINERALTalc or spar.
MINERALGuessing-game subject
MINERALKind of water
MINERALKind of spring
MINERALA preceder of spring
MINERAL"Twenty Questions" category
MINERALEgeran or epidote
MINERALEpidote or egeran
MINERALCoal or quartz
MINERALOld quiz show category