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This is the photo of the rock. I found it in the mountains in yemen, near rocks where a well was dug out. Its translucent green and It doesn't feel that heavy. I think it's some type of quartz. enter image description here

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closed as off-topic by trond hansen, Camilo Rada, Jan Doggen, Gimelist, arkaia Apr 14 at 23:15

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Color and shape suggests your specimen is most likely fluorite. Sea-green is a classic color for fluorite. Roughly equant shape suggests the mineral is isometric or possesses cleavage / fracture characteristics that allows the mineral to break into equant shaped pieces. It could also be calcite, quartz or barite based on density. You would need to measure the density to be sure.

Density (gm/cc) (Source: Google)

  • Quartz/chalcedony: 2.60 - 2.64
  • Calcite: 2.71
  • Fluorite: 3.01 - 3.25, Average = 3.13
  • Barite: 4.48

Fluorite can be found in Yemen. (wikipedia)

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Agree with Gary. Quartz has concoidal fracture like broken glass. This specimen displays perfect cleavage in two directions.

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