Graphite and Diamond Have the Same Chemical Composition and Different

Q32: What is the hardest mineral known?

Q76: The principal ore of mercury is _.<br>A)anhydrite<br>B)cinnabar<br>C)galena<br>D)sylvite

Q77: Ruby and sapphire are red and blue

Q78: What physical property denotes the colour of

Q79: Name a characteristic of a mineral.

Q81: In ionic compounds, _ have lost one

Q82: Small, parallel grooves (twinning striations)are visible on

Q83: Which of the following minerals is a

Q84: The external expression of internal atomic arrangement

Q85: Calcite and dolomite are both carbonate minerals.