People use rocks and minerals in their daily lives. Please tell us their purpose. (at least three kinds)

7. Andesite: Because of its hard material, it is often used as the dragon pillar, stone carving, tombstone and floor tile of the temple.

Two. A mineral from which metals can be extracted.

1. Gold deposit: After weathering and erosion with Jin Yanshi, gold will be separated into natural gold, because gold is much heavier than sediment, and it is easy to precipitate into gold after elutriation.

2. Chalcopyrite: Chalcopyrite is the most important mineral for extracting copper.

3. Galena: Galena is lead-gray with cubic cleavage and is the most important lead-containing mineral.

4. Hematite: The appearance color of hematite is iron gray or reddish brown, and it is the most important iron-containing mineral.

5. Magnetite: Magnetite is an iron-containing mineral, which is magnetic and can adsorb iron-containing substances.

Third, precious stones.

If minerals are hard, rare, durable, transparent and beautiful in color, they are often used as decorations, generally called gems. The following is a brief introduction of common gems:

1. diamond: commonly known as diamond, there are many colors, such as light yellow, brown, white, blue, green and red. , in which colorless and transparent is the highest value.

2. corundum: corundum also has many different colors, such as: red corundum is commonly known as ruby, and blue corundum is called sapphire.

3. Opal: generally colorless or white, and some have special halo.

4. Crystal: Pure single crystal is called crystal, which has different colors due to different impurities, such as topaz and amethyst. The timely fibrous microcrystalline polymer is called chalcedony; The timely granular microcrystalline polymer is called flint, and these two minerals are important jade in Taitung County.

Fourth, as a pigment.

Some minerals have special colors and can be used to make pigments, such as blue kyanite, green malachite and red cinnabar.

Other uses of verbs (abbreviation of verb)

1. Timely: Timely is the main raw material for manufacturing glass and semiconductors. For example, quartz sand in Shangfuji sandstone in Wenshuixi, Miaoli County is the main material for making glass.

2. Calcite: Calcite exists in marble and limestone and is the main raw material for manufacturing cement.

3. Muscovite: Muscovite is often used as an insulator in electric heaters because of its non-conductivity, non-thermal conductivity and high melting point.

4. Graphite: with low hardness, oily luster and black stripes, it is often used to make pencil lead. In addition, graphite can also be made into lubricants, electrodes, crucibles, etc.

5. Sulfur: Hot springs in volcanic areas contain yellow sulfur.

6. Gypsum: Gypsum is generally used to fix fracture wounds or make statues, and is also used in the construction industry.

7. Apatite: used to make phosphate fertilizer for agriculture.

8. Serpentine: a component containing magnesium, which can be used in steel-making industry.

9. Talc: low hardness and satiny; It is usually ground into powder and made into pigments, talcum powder, decontamination powder and chemicals. Grade, etc.