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A wonderful display specimen from the famous Black Cloud mine featuring razor-sharp, vitreous rhombohedra of cream-colored Dolomite – some of which are oriented into spherical aggregates – which are sitting atop black Sphalerite, silvery Galena and golden Pyrite matrix. Excellent quality and wonderful aesthetics. The Black Cloud Mine was one of the most famous specimen producing locales in Leadville and was one of the last operating mines in Colorado when it closed in 1999. The Leadville mining district was the most productive silver-mining region in Colorado. As of 1963 the cumulative production of the area was 240 million troy ounces of Silver = $6.6 billion at today’s prices. Specimen# CO712B45
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🇺🇸 Ship from USA · On Agora since 2026
$170.00