$105Median
16Sold (12 mo)
$50Last sale
Pyrolusite from Michigan, USA
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An excellent thumbnail specimen for the species and locality with lustrous prismatic crystals of pyrolusite coming off matrix. In good condition.Pyrolusite is a manganese oxide mineral that commonly forms in the oxidized zones of manganese bearing deposits. It typically appears as dark gray to black fibrous or massive material and is an important ore of manganese. Specimens are well known for their quality at this locality, where small mining operations explored iron and manganese bearing deposits in Precambrian rocks of the Upper Peninsula. Although the region was known mainly for iron mining, secondary manganese minerals such as pyrolusite have been found in altered zones of the host rock.
Product details
Current owner
Unknown Owner
- Acquired
- Mar 2026
- Price paid
- $90.00
Previous owners
| Date | Collector | Acquisition price |
|---|---|---|
| — | Weinrich Minerals | Not disclosed |
Learn more
Mineral guide
Learn about Pyrolusite
jet-black crystals and dramatic pseudomorphs with steel luster; prized display pieces from storied Mn deposits, Ilfeld and the Kalahari Field.Regional guide
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