Reviews
4.5" Polished Wild Horse Magnesite Slab - Arizona
This is a beautiful, polished slab of wild horse magnesite that was collected from southeastern Arizona. It has been cut flat on both sides and polished to a mirror-like finish on one side. It 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.
$79
SPECIES
Magnesite & Hematite
LOCATION
Globe Copper Mine, Southeast Arizona
SIZE
4.5 x 3.9", .25" thick
CATEGORY
ITEM
#301693
