You're asking for one of the eight common rock-forming minerals, not "basic". Here are the eight:

1. Quartz (SiO2): A hard, glassy mineral that is resistant to weathering.

2. Feldspar (various compositions): The most abundant mineral in the Earth's crust, often found in igneous and metamorphic rocks.

3. Mica (various compositions): A sheet-like mineral that often splits into thin, flexible layers.

4. Amphibole (various compositions): A group of minerals that form elongated, prism-shaped crystals.

5. Pyroxene (various compositions): Another group of minerals that form elongated, prism-shaped crystals.

6. Olivine (Mg,Fe)2SiO4: A green mineral found in igneous rocks, especially those formed at high temperatures.

7. Calcite (CaCO3): A common mineral in sedimentary rocks, especially limestone.

8. Dolomite (CaMg(CO3)2): A similar mineral to calcite, but with magnesium replacing some of the calcium.

Let me know if you want to know more about any of these minerals!