Mineral Identification Key:  Create a chart showing the number of a mineral sample and use this chart to find out which mineral it is.

ALWAYS start with "Step 1".

1. a. If your mineral has a metallic luster(look for metallic specks under magnification); sample 3, 4, 8

         GO TO STEP 2.     

   b. If your mineral has a nonmetallic luster, GO TO STEP 3.

2. a. If your mineral is black or red, GO TO STEP 4.

   b. If your mineral has large, visible crystals, go to STEP 9.

   c. If your mineral is clear or white, GO TO STEP 5.

3. a. If your mineral is light in color, GO TO STEP 5.

   b. If your mineral is dark in color or contains many dark specks, GO TO STEP 6.    

4.  a. If your mineral leaves a red-brown line on the streak plate, it is HEMATITE.

    b. If your mineral leaves a black line on the streak plate and is magnetic, it is MAGNETITE.

5.  a. If your mineral scratches a glass plate, GO TO STEP 7.

    b. If your mineral does not scratch glass, GO TO STEP 8.

6.  a. If your mineral scratches the glass, GO TO STEP 9.

    b. If your mineral does not scratch the glass, GO TO STEP 10.

7.  a. If your mineral shows signs of cleavage, it is FELDSPAR

    b. If your mineral shows fracture, it is QUARTZ.

8.  a. If your mineral looks like a piece of light colored glass or plastic, go to STEP 10.

    b. If your mineral shows signs of cleavage (very thin layers or “fish scales”) it is MICA.

    c. If your mineral does not show signs of cleavage, has mild fracture, and feels greasy or slick, it is TALC.

    d. If your mineral shows fracture but does NOT feel greasy or slick, it is GYPSUM.

9.  a. If your mineral has large grains it is HORNEBLENDE.

    b. If your mineral has tiny or hard to see grains, it is CORBORUNDUM.

    C.  if your mineral has a dark streak but a light color, it is Pyrite.

10. a. If your mineral has a black streak, it is GRAPHITE.

      b. If your mineral has cleavage and a dark red streak, it is HEMATITE.

     c.  If your mineral has a white streak and cleavage, it is CALCITE.

     d. If your mineral has a white streak and has fracture, it is FLOURITE.

     e. If your mineral has rough fracture and a dark streak, it is Pyrolusite.