Custom cut and polished Mariposite Heart Necklace/Pendant/Slide/Enhancer custom wire wrapped in sterling silver. A friend had collected this material for us Mariposite from Sierra County, CA we are so very honored. size: 1 15/16 x 1 3/16 inches or 50mm x 30mm
WHAT IS MARIPOSITE?
“Mariposite” is an informal name that is most often used for green micas that are thought to be colored by small amounts of chromium. The name “mariposite” has also been used for a group of green and white metamorphic rocks that contain significant amounts of green mica. "Mariposite" has been used in many different contexts since the late 1800s.
The name originates from the community of Mariposa, California. Green mica and green rocks that derive their color from green mica are seen in a few spectacular outcrops in that area. During the California Gold Rush, many prospectors learned that mariposite rocks were often sources of gold. Looking for green and white rocks became a prospecting method that sometimes resulted in success.
THE METAMORPHIC ROCK CALLED “MARIPOSITE”
The name “mariposite” is also used for rocks. The rocks contain enough particles of green mica to produce a green color. These rocks are metamorphic, have been altered by hydrothermal activity, and they are usually thought to have a serpentinite protolith. The green mica usually accounts for a small percentage of the rock, with the major constituents being quartz, calcite, dolomite, ankerite or barite.
During the California Gold Rush, prospectors learned that “mariposite” was sometimes a host rock of gold. The sight of mariposite as stream cobbles or in outcrops became a well-known sign that gold might be present. This knowledge was later used in the search for gold in other parts of California, British Columbia, Alaska, and other parts of the world.
MARIPOSITE MINERAL LOCALITIES
Use of the name “mariposite” for green micas has also spread across the world. Mindat.org lists numerous mariposite localities in the United States (Alaska, Arizona, California, Colorado, Nevada, Tennessee, Utah, Washington), Austria, Canada, China, France, Ireland, Japan, Papua New Guinea, Spain, Sweden, and Venezuela.