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22 Multiple choice questions

  1. The study of minerals.
  2. A mineral or form of a mineral that is particularly beautiful and/or rare, and thus has value.
  3. The flat surface of an euhedral mineral grain.
  4. The general shape of a crystal or cluster of crystals that grew unimpeded.
  5. A list of ten minerals in a sequence of relative hardness, with which other minerals can be compared.
  6. The way a mineral surface scatters light.
  7. The flat surface of a cut gemstone; facets are produced by grinding.
  8. A cavity in which euhedral crystals precipitate out of water solutions passing through a rock.
  9. Minerals composed of silicon-oxygen tetrahedra linked in various arrangements; most contain other elements as well.
  10. A number representing the density of a mineral, as specified by the ratio between the weight of a volume of the mineral and the weight of an equal volume of water.
  11. The internal arrangement of atoms or ions within a crystal.
  12. A homogenous, naturally occurring, solid inorganic substance with a definable chemical composition and an internal structure characterized by an orderly arrangement of atoms, ions, or molecules in a lattice. Most minerals are inorganic.
  13. (1) The tendency of a mineral to break along preferred planes; (2) a type of foliation in low-grade metamorphic rock.
  14. Smoothly curving, clamshell-shaped surfaces along which materials with no cleavage planes tend to break.
  15. The condition in which the shape of one part of an object is a mirror image of the other part.
  16. In mineralogy, hardness refers to the resistance of a mineral to scratching; a harder mineral can scratch a softer mineral.
  17. The basic building block of silicate minerals; it consists of one silicon atom surrounded by four oxygen atoms.
  18. The orderly framework within which the atoms or ions of a mineral are fixed.
  19. Two minerals that have the same chemical composition but a different crystal lattice structure.
  20. Rocks containing calcite and/or dolomite.
  21. The color of the powder produced by pulverizing a mineral on an unglazed ceramic plate.
  22. A single, continuous piece of a mineral bounded by flat surfaces that formed naturally as the mineral grew.