The crystalline rocks of ore body in detail view with the naked eye cannot see, because minerals crystallize quickly. Make small crystals with purple, green, grey, black or is sufficiently. Must use a microscope diagnosis?
Stone fine Crystals of a mineral naked eye can not see. Quickly crystallized minerals Make the crystals are small, purple, green, gray or black to require microscopic examination.
As the rocks texture mineral crystals of invisible to the eyes. Because mineral crystallizes rapidly, mineral crystals are small, purple, green, gray, black, or to use the microscope examination.