Horned porphyry is characterized by a dense, horn-like texture and typically exhibits a porphyritic structure. The phenocrysts are primarily composed of albite or albite-longite, with dark mineral phenocrysts being relatively rare. These include biotite, hornblende, and pyroxene. The groundmass is cryptocrystalline, showing a fine-grained texture with a rough surface appearance. It mainly consists of albite or albite-longite, along with accessory minerals such as chlorite, epidote, and calcite. Under the microscope, quartz patches can be observed, often displaying signs of dissolution. The feldspar phenocrysts tend to undergo alteration, forming aggregates of sericite and kaolin. Amphibole minerals in this rock are usually well-formed crystals rich in sodium, but they are prone to transforming into fibrous pseudohornblende. The distinguishing mineral of this rock type is albite or albite-longite, with additional components including chlorite, epidote, and calcite. Darker minerals present are mainly biotite and fluorite. This rock type is commonly associated with hydrothermal activity and is often found in areas where intrusive igneous bodies have interacted with surrounding rocks, leading to various metamorphic and alteration processes. Carbide Corner Rounding Endmills,Solid Corner Rounding Endmills,4 Flutes Corner Rounding Endmills Suzhou Meiwei Cutting Tools LTD , https://www.meiweitools.com