Red minerals.

There are many types of red minerals found in nature. Some common examples include:

1. Ruby: A precious gemstone known for its deep red color. It is a variety of the mineral corundum and is valued for its rarity and beauty.

2. Garnet: A group of minerals that come in various colors, including red. Red garnets are often used as gemstones and are known for their high luster and hardness.

3. Cinnabar: A bright red mineral that is the principal ore of mercury. It is often found in volcanic or hot spring environments and has been historically used for its mercury content.

4. Rhodochrosite: A pink to red mineral that is a popular gemstone. It is often used in jewelry and has a unique pattern of swirls or bands of various shades of red.

5. Cuprite: A red oxide mineral that is often used as a copper ore. It is known for its deep red color and can be found in copper-rich areas.

6. Vanadinite: A red or orange mineral that contains lead and vanadium. It is often found in small crystals and is prized by collectors for its unique color and crystal habit.

These are just a few examples, and there are many other red minerals that exist in nature. The color of minerals can vary due to different chemical compositions and impurities present in their crystal structures.