Those specimens change colors dependently on the nature of the light. Also, some of the rarest sunstones resemble alexandrite properties. The rare and most valuable stones have dichroic or trichroic properties that mean the colors or color depth are changed when observed from different directions. Other sunstones might have green patches with a red color. Some crystals can exhibit colors changes, for example, showing pink on one side and red on the opposite side of the stone. The highest copper concentration makes Oregon sunstones highly-prized and popular among artisans and collectors. The red stone contains the highest concentration of copper, over 200 parts per million (0.02%). Light is reflected from tiny copper platelets and when viewed from certain angles exhibits a bright flash of light to the eye.Ĭolor relates to the amount of copper in the sunstone. The mineral has copper inclusions that provide a shimmering optical effect known as schiller or aventurescence. Oregon Sunstones Color Determines Its Value It's only sunstone containing copper which gives metallic flashes that are prized by gemologists. However, Oregon Sunstones differ from the classic specimens. Sunstones have been found in many locations around the world including Canada, Mexico, Norway, Australia, Russia, China, Tanzania, and the United States of America including New York, Virginia, Pennsylvania, and Oregon. Rare and beautiful mineral crystals, Oregon Sunstones are found only in the high desert of Southeastern Oregon.
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