Known Minerals

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Exercise Question

Mineral Tables PDFActions

Lab 09 Identifying Unknown Materials Worksheet

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To complete the provided worksheet and correctly identify the following minerals, you will need to refer back to the various parts of this lab. Carefully identify and classify the physical properties of each sample and record your answers in the worksheet. I recommend that you work in order from the left of the table to the right for each sample mineral. Your final determination of the name of each mineral is LESS important than the work you put into correctly filling out the worksheet.

Q12. Fill out the accompanying worksheet for the three unknown mineral samples labeled A, B and C. You will determine the physical properties of the samples by examining the images of the sample, glass plate and streak plate provided to you.

• Color – describe
• Luster – metallic or nonmetallic
• Hardness – scratches glass than is >5.5, does not scratch glass <5.5
• Streak – describe color
• Mineral Name – once you’ve completed the worksheet, refer to the appropriate table by referencing the physical properties your determined and select the mineral name that best matches your data
  1. MT1: Minerals with Metallic Luster or Dull (Tarnished) Metallic Luster
  2. MT2: Minerals with Nonmetallic Luster (Hardness >5.5, streak is white/white-like, no cleavage)
  3. MT3: Minerals with Nonmetallic Luster (Hardness >5.5, streak is white/white-like)
  4. MT4: Minerals with Nonmetallic Luster (Hardness <5.5, streak is colored)
  5. MT5: Minerals with Nonmetallic Luster (Hardness <5.5, streak that is faint/white/white-like, none/indistinct or poor cleavage)
  6. MT6: Minerals with Nonmetallic Luster (Hardness <5.5, streak that is faint/white/white-like)

Sample A
Click here for a sample images page

Sample B
Click here for a sample images page

Sample C
Click here for a sample images page