History of the Oregon Occurrence It has long been known that sunstones, or aventurine feldspar of appreciable size and goad quality occur in the Warner Valley in lake County, Oregon (Figure 4). Some Oregon sunstones exhibit a glow from within due to millions of microscopic copper platelets, known as schiller. In eastern Oregon, sunstone occurs as phenocrysts in highly porphyritic basalt flows (see figure 4). Locally the sunstones are referred to as "Plush Diamonds," and it is reported that the old maps of lake County show the "Sunstone … sunstones. In the US state of Oregon in the early 1900s, there were reports of sunstone finds in ancient lava fields in a desert area called Warner Valley. Located in the remote Rabbit Basin, the Oregon Sunstone Public Collection Area is in the high desert habitat of sagebrush and open spaces of south-central Oregon.

Sunstones are copper-laden crystals that formed tens of millions of years ago – the crystals flowed to the surface with volcanic magma and are concentrated in this part of Southeastern Oregon. Weathering …
Even earlier, Native Americans in that area might have been the … Colors of the stone vary from clear, champagne, yellow, light pink, salmon, orange, … A calcium-rich Oregon sunstone formed in molten basaltic lava flows thirteen to fourteen million years during Steens Mountain eruption. The history of Oregon Sunstone began with Native Americans assigning special value to the unique crystals they found on the surface of the earth, and evolved into a rich three decade old modern … For thousands of years, the lava remained under water. They are a minor but fascinating part of the region’s recent geologic history, likely originating during … It’s the microscopic copper bits that give sunstones …

Know Before You Go: The boundaries of the Oregon Sunstone Public Collection Area are marked by orange plastic posts that say ‘Oregon Sunstone …

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