This printable crossword puzzle on the topic of Rocks & Minerals has 12 clues. Answers range from 3 to 18 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
the ways in which a mineral reflects light
the color of the powder of a mineral
the splitting of a mineral along smooth flat surfaces
the manner in which a mineral breaks along either curved or irregular surfaces
a measure of the ability of a mineral to resist scratching
the ratio of the mass of a substance to resist scratching
the physical shade of a mineral least reliable way to identify a mineral
a mineral that does not contain compounds of silicon and oxygen
a scale used to determine the hardness of a mineral
a natureal material whose minerals are valuable enegh to be mined as profit
the process of returning land to its original condition after mining is complete
a mineral that contain compounds of silicon and oxygen