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4.4" Polished Wild Horse Magnesite Section - Arizona
This is a beautiful, polished slab of wild horse magnesite that was collected from southeastern Arizona. It has been cut flat on and polished to a mirror-like finish on one side, while the opposite side has been left in its rough state. Comes with an acrylic display stand
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
4.4 x 4.1", up to .7" thick
CATEGORY
ITEM
#114310
