Oregon Sunstones Macros
Oregon Sunstones are a clear feldspar created in basalt heavy lava flows, although I have seen them in non-basalt areas. By far the most common color is yellow, but orange/red tinted with schiller (tiny copper flakes as seen below) is fairly rare, and green is the most coveted. Rarest of all though are blue/purples from the Ponderosa Sunstone Mine.
The Sunstone was Oregon’s state gem on August 4th, 1987. In theory these should be available anywhere in the world where basalt formations are found. But instead they are limited only a few places in the world, Norway, Pennsylvania, Oregon, Virginia, and Utah.
The Gemological Institute of America talks in depth about Oregon Sunstones, and where they can be found in state. Most interesting to note is how different locations have different yields on colored stones.