Warm Up What is the major difference between an element and a compound?

How can we identify unknown minerals? Mineral Identification Lab

Is Your Sample...?

Streak

Your Sample Is  Hematite – 3  Hematite is a compound – Fe 2 O 3 (iron and oxygen)  Start Over Start Over Start Over

Your Sample Is  Pyrite – 4  Pyrite is a compound – FeS 2 (iron and sulfur)  Start Over Start Over Start Over

Hardness

Your Sample Is  Magnetite – 14  Magnetite is a compound – Fe +2 Fe 2 +3 O 4 (iron and oxygen)  Start Over Start Over Start Over

Luster

Your Sample Is  Galena (7)  Galena is a compound – PbS (lead and sulfur)  Start Over Start Over Start Over

Your Sample Is  Graphite – 9  Graphite is an element – C (carbon)  Start Over Start Over Start Over

Color  Yellow Yellow  Other Other

Your Sample Is  Sulfur – 8  Sulfur is an element - S  Start Over Start Over Start Over

Hardness  Fingernail Fingernail  Penny Penny  6+ 6+

Your Sample Is  Calcite – 5  Calcite is a compound – CaCO 3 (calcium, carbon, and oxygen)  Start Over Start Over Start Over

Luster  Glassy Glassy  Pearly Pearly

Color  Colorless/White Colorless/White  Brownish Brownish

Your Sample Is  Halite – 15  Halite is a compound – NaCl (Sodium and Chloride – salt)  Start Over Start Over Start Over

Your Sample Is  Muscavite Mica – 2  Muscavite Mica is a compound – KAl 2 (Si 3 AlO 10 )(OH,F) 2 (Potassium, Aluminum, Silicon, Oxygen, Hydrogen, and Fluorine)  Start Over Start Over Start Over

Color  Pale Green/Gray/White Pale Green/Gray/White Pale Green/Gray/White  Colorless/White Colorless/White

Your Sample Is  Talc – 13  Talc is a compound – Mg 9 Si 4 O 10 (OH) 4 (magnesium, silicon, oxygen, hydrogen)  Start Over Start Over Start Over

Your Sample Is  Gypsum – 12  Gypsum is a compound – CaSO 4 *2H 2 O (Calcium, Sulfur, Oxygen, Hydride)  Start Over Start Over Start Over

Luster  Glassy Glassy  Pearly Pearly

Your Sample Is  Microcline Feldspar  Microcline Feldspar is a compound – KAlSi 3 O 8 (Potassium, Aluminum, Silicon, and Oxygen)  Start Over Start Over Start Over

Your Sample Is  Quartz  Color – Clear/colorless – Rock Quartz – 10  Color – Pink – Rose Quartz – 6  Quartz is a compound – SiO 2 (Silicon and Oxygen)  Start Over Start Over Start Over

Conclusion  How many samples were elements? Compounds?  What was the easiest mineral property to identify?  What was the hardest mineral property to identify?  What minerals had special properties? What were they?  What did you learn from this lab?