5 Written Questions
4 Multiple Choice Questions
- all minerals share ___.
- formed by natural processes and are solids
- one of the softest minerals
- a mineral is no longer classified as an ore once it is no longer ___.
4 True/False Questions
topaz → quartz has a hardness of 7 so will not scratch this mineral.
the mineral can no longer be mined at a profit → if the cost of separating a mineral from waste rock becomes to great, the mineral is no longer an ore. This happens because___.
profitable and useful → properties that make a diamond a gemstone.
cleavage → Muscovite mica will peel off in flat sheets. this is a physical characteristic called ___.