According to today's headline data, the names of sun stones are "actinolite" and "Venus feldspar", which is a kind of plagioclase. It is named because there are many neatly arranged and brightly colored flaky mineral inclusions in feldspar. When it is illuminated by light, it reflects shining bright spots, just like the radiant light of the sun, which is the product of sun worship of all nationalities in the world. Distributed in western Norway and parts of the United States, it is also the state stone of Oregon.

Sunstone is a kind of plagioclase. Because the crystal contains reddish-brown flaky mineral inclusions such as hematite and goethite, the reflected light produces golden yellow dazzling flash, which is called "daylight effect", also known as placer gold effect. Sunstone is generally translucent dark orange, gold and golden brown, and occasionally colorless and transparent.