👉 Gneissic is a type of igneous rock, which refers to rocks that are formed from magma or lava and are typically composed of quartz, feldspar (sapphires), and mica. The term "gneissic" comes from the Greek word "gneis", meaning "stone". Gneisses are often found in volcanic regions and can be found in a variety of rocks, including granite, gabbro, and pyroxene.
