 Feldspar Beads are made from Feldspar rock, which is the name of an important group of rock-forming minerals which make up perhaps as much as 60% of the Earth's crust. Feldspars crystallize from magma in both intrusive and extrusive rocks; they occur as compact minerals, as veins, and are also present in many types of metamorphic rock. They are also be found in many types of sedimentary rock. Feldspar Beads belong the most common group of rock-forming minerals. Feldspar Beads contain sili-con, oxygen, aluminum, and some combination of the metals sodium, potassium, and calcium. Feldspar Beads are hard, opaque, and break along flat, reflective surfaces, which meet at right angles. Orthoclase feldspar usually is white, beige, or pink in color, whereas plagioclase feldspar usually is white or gray in color. |
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