Today, you’ll learn what to look for in a broken mineral. There are different names for the types of breaks that a mineral can experience. You’ll need to ask a few important questions during your investigation, like, “What is the difference between mineral cleavage and fracture?”


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3 Responses to “Cleavage & Fracture”

  1. Quartz doesn’t have cleavage – it breaks irregularly.

  2. Doris Gatewood says:

    I was wondering about the quartz. The sample that we have which I thought was quartz because it was referred to as quartz in the last video about Moh’s scale of hardness . It has flat sides indicating cleavage and is quite translucent. I think I saw it laying on the table in this video as well . But you talk about quartz as having only fracture properties and showed a picture of pieces that are rough on all sides. Thanks in advance for some clarity.

  3. Michelle Stevens says:

    The obsidian is really pretty.
    -Olivia