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2.15" Polished Wild Horse Magnesite - Arizona
This is a small, polished section of wild horse magnesite that was collected from southeastern Arizona. It has been cut flat and polished to a mirror-like finish on one side.
About Wild Horse Magnesite
Wild Horse Magnesite—often marketed as “Crazy Horse Stone”—is a striking semi-precious gemstone prized for its bold contrast of creamy white magnesite veining against a deep red-brown, hematite-rich matrix. It is found exclusively near the Globe Copper Mine in southeastern Arizona, making it a distinctly American lapidary material with a limited and highly localized source.
Geologically, this stone forms through low-grade metamorphism, typically between 200–320°C under relatively low pressure. During this process, magnesium-rich host rock interacts with carbonate-bearing fluids, precipitating networks of white magnesite that branch, swirl, and plume through the surrounding iron-stained rock. The result is the stone’s signature patterning: patches and plumes of snow-white magnesite interwoven with mottled grey, chocolate, and russet hues created by hematite and other iron oxides.
Wild Horse Magnesite—often marketed as “Crazy Horse Stone”—is a striking semi-precious gemstone prized for its bold contrast of creamy white magnesite veining against a deep red-brown, hematite-rich matrix. It is found exclusively near the Globe Copper Mine in southeastern Arizona, making it a distinctly American lapidary material with a limited and highly localized source.
Geologically, this stone forms through low-grade metamorphism, typically between 200–320°C under relatively low pressure. During this process, magnesium-rich host rock interacts with carbonate-bearing fluids, precipitating networks of white magnesite that branch, swirl, and plume through the surrounding iron-stained rock. The result is the stone’s signature patterning: patches and plumes of snow-white magnesite interwoven with mottled grey, chocolate, and russet hues created by hematite and other iron oxides.
SPECIES
Magnesite & Hematite
LOCATION
Globe Copper Mine, Southeast, Arizona
SIZE
2.15" wide, up to .4" thick
CATEGORY
ITEM
#167401
