Silicon, a member of the metalloid class in the carbon group, is the second most abundant element in the Earth’s crust. It rarely occurs in its pure form as a mineral; instead, it is typically found in the form of silicates and silica. As a native element, silicon appears as a dark gray to bluish-black, crystalline substance with a metallic luster. It exhibits a diamond cubic crystal structure and is known for its brittle nature and low electrical conductivity.


Silicon is an indispensable material in a wide range of applications. It serves as the fundamental building block of various silicate minerals, which are crucial components of rocks, soils, and clays. Silicon is also the primary component in the manufacturing of semiconductors, making it essential for the electronics and computer industries. Furthermore, silicon is used in the production of solar cells, glass, ceramics, and various alloys, including aluminum-silicon and ferrosilicon alloys.


Silicon itself is not considered a gemstone; however, it is a crucial component in the formation of many gemstones, such as quartz, opal, and various feldspars.


Silicon is predominantly formed through the fusion of lighter elements within the cores of stars, particularly during supernova explosions. It is subsequently dispersed throughout the universe, eventually becoming incorporated into various celestial bodies, including planets like Earth. On Earth, silicon is primarily found in the form of silica (SiO2) and silicate minerals.


Silicon is a significant component of many common rock-forming minerals, particularly those in the Earth’s crust. As a result, it can be found in various igneous, metamorphic, and sedimentary rocks, such as granite, basalt, gneiss, schist, and sandstone. Some of the largest deposits of silicon-containing minerals are located in Brazil, the United States, Russia, and China.


While silicon itself does not have a specific metaphysical significance, many silicon-based minerals, such as quartz and feldspars, are believed to possess various metaphysical and healing properties. These minerals are often used in crystal healing and spiritual practices to promote clarity, balance, and emotional healing.

ClassNative Element (carbon group)
Hardness (Mohs)6.5
StreakGrayish blue
ColorDark gray to bluish-black
Specific Gravity2.33