1. Building Material: Hornblende, especially in its darker varieties, is often used as an aggregate in concrete, asphalt, and other construction materials. Its durability and resistance to weathering make it a suitable component.

2. Dimension Stone: Some varieties of hornblende are attractive enough to be used as dimension stone, for example, in building facades or countertops. Its dark green to black color and often shimmering appearance can add visual interest to architectural elements.

3. Gemstone: Certain varieties of hornblende, particularly those with a deep green color and good transparency, are cut and polished as gemstones. These are known as "Verdelite" or "Green Hornblende."

4. Ceramic Glazes and Paints: Hornblende can be ground into a fine powder and added to ceramic glazes to create a variety of colors, particularly green hues. It can also be used as a pigment in paints.

5. Industrial Uses: Hornblende is used in various industrial applications, such as in the production of abrasives, insulation, and some types of fertilizer. Its hardness and resistance to chemical attack make it suitable for these applications.

It's important to note that the specific use of hornblende depends on the specific variety and its properties.