Andesine Feldspar for sale at wholesale prices. Andesine Feldspar comes from the plagioclase group of Feldspar that is found in many locations around the world. It measures 6 – 6.5 on the MOHS scale making it a little bit soft but still durable. This semi precious gemstone can be found as a beautiful clear yellow stone, or as a vibrant red and green stone with small inclusions causing the color. We are lucky enough to have a few pieces for sale since these are a rare stone and are hard to find.