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Rare Massive Topaz & Quartz Vein in Hydrothermally Altered Greisen
Locality: Einstein Silver Mine / Ozark Shaft, Silver Mines District, Madison Co., Missouri.
Provenance: Ex-Cox Collection; Original Charlie Byrd Collection
The Geological Story
This is a substantial, museum-quality cabinet specimen from the most famous \"Old Stock\" locality in the Missouri Ozarks. Unlike common quartz found throughout the state, this piece represents a rare Greisenization event. The \"home rock\" is a classic Silver Mines Greisen—a granite that was chemically transformed by super-heated, mineral-rich fluids 1.5 billion years ago.
Mineralogical Highlights
Massive Topaz: The thick, cream-to-tan bands are massive Topaz. Missouri is the only place in the Midwest where this mineral occurs in this association, making it a \"bucket list\" item for regional collectors.
Smoky & Ferruginous Quartz: The quartz veins show beautiful clarity in sections, with distinct reddish-orange \"fire\" caused by hematite/iron-oxide inclusions.
Accessory Minerals: Close inspection reveals dark, metallic inclusions (visible in photos). These are likely Wolframite (Tungsten ore) or Zinnwaldite mica, both characteristic \"fingerprint\" minerals for the Einstein Mine locality.
Aesthetic Banding: The specimen features a sharp, \"Zebra-stripe\" vein structure that illustrates the exact path the mineral-rich fluids took through the Precambrian crust.
Historical Significance (The Byrd/Cox Connection)
This specimen is part of the legendary \"Byrd Box.\" Charlie Byrd was a titan of Missouri mineral collecting, and his pieces are rarely seen on the open market today. The presence of the hand-marked \"CB\" initials directly on the rock provides ironclad provenance. It later resided in the prestigious Cox Collection, adding a secondary layer of historical pedigree. Specimens of this size (over 4 lbs) with verified 19th-century mining origins are nearly impossible to find today.
Weight: 6 lbs 2 oz
Dimensions: 5.25\" x 4.75\" x 5\"
Locality: Einstein Mine / Ozark Shaft, Silver Mines District, Madison County, Missouri.
Provenance: This specimen comes from the prestigious Cox Collection, with original roots in the Charlie Byrd Collection. Many pieces in this \"Byrd Box\" are marked with the initials CB, ensuring historical continuity.
Specimen Details: A substantial cabinet-sized block of Greisen host rock featuring thick, distinct veins of massive Topaz and Quartz. The banding
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