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Beaconite

A variety of Talc
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Formula:
Mg3Si4O10(OH)2
A fibrous variety of talc resembling asbestos.

Originally reported from Champion Mine (Beacon Mine), Champion, Marquette iron range, Marquette Co., Michigan, USA.


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Unique IdentifiersHide

Mindat ID:
587 (as Beaconite)
3875 (as Talc)
Long-form identifier:
mindat:1:1:587:0 (as Beaconite)
mindat:1:1:3875:7 (as Talc)

Pronunciation of BeaconiteHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Chemistry of BeaconiteHide

Mindat Formula:
Mg3Si4O10(OH)2
Element Weights:
Element% weight
O50.622 %
Si29.621 %
Mg19.225 %
H0.532 %

Calculated from ideal end-member formula.
Elements listed:
H, Mg, O, Si - search for minerals with similar chemistry

Synonyms of BeaconiteHide

Other Language Names for BeaconiteHide

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for BeaconiteHide

References for BeaconiteHide

Reference List:
Rocks & Minerals 27:34

Localities for BeaconiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the Image symbol to view information about a locality. The Image symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

Image - This locality has map coordinates listed. Image - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. Image - Good crystals or important locality for species. Image - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
USA
 
  • Michigan
    • Marquette County
      • Champion Township
        • Champion
Heinrich et al. (2004)
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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
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