Unakite (hardness 6 to 7) is a metamorphic rock created when granite is altered by hydrothermal activity. It is known for it's peach colored feldspar spots, pistachio green epidote, and clear quartz. While it usually isn't used in commercially made jewelry, it's a favored stone in craft jewelry. It's also used in some architectural settings such as the Smithsonian Natural History Museum. Slabs of unakite trim the front steps and are used as floor tiling on the entrance landing.
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