Amazonite is a beautiful green variety of microcline feldspar, and forms in masses or tabular crystals. Microcline is common, but the green variety of microcline feldspar is rare. Amazonite is still found in other parts of Brazil however, as well as the USA, Australia, Russia and Madagascar. Amazonite is a mostly opaque stone textured with pale milky-white cloudiness or streaking ranging from light green to greenish blue to deep green/blue.