Examlex
Which of the following can fall below the x axis when graphing price and cost against quantity?
Greenstone
A metamorphic rock, typically formed under low-grade conditions, that has a greenish color due to the presence of minerals such as chlorite, epidote, or actinolite.
Marble
A metamorphic rock composed of recrystallized calcite or dolomite.
Quartzite
A very hard rock consisting chiefly of quartz grains joined by secondary silica that causes the rock to break across rather than around the grains; formed by metamorphism or by silica cementation of a quartz sandstone.
Slate
A compact, fine-grained, low-grade metamorphic rock that possesses slaty cleavage.
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