Picture Color Coarse or Fine Grained A B Rocks to Identify - Page 1 Other Observations C Dark Fine Light, Fine pinkish Light, some pink minera I grains Coarse If Coarse Grained, Mineral Grain Description none none Pink grains have a hardness of 6. Clear/white grains have a hardness of 7. Black grains are biotite) Small holes, very rough surface Density Average though samples without holes are slightly heavy Average Average Rock Name geology.com geology.com A B C

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