Machine-translated by Google. Questions are authored in English.
Top

Discussion

Streak is a more reliable identifying property than colour because streak is the colour of the

  • A.mineral under ultraviolet light
  • B.mineral's crystal faces only
  • C.mineral in powdered form
  • D.mineral's freshly broken surface

Answer: C

Drawing the specimen across unglazed porcelain removes the effect of surface films and of the coarseness of the crystal. Haematite is the classic case, appearing black or grey in the mass yet always giving a red-brown streak.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.