Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Microcline from
Tanco Mine, Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada


Locality type:Mine
Classification
Species:Microcline
Formula:K(AlSi3O8)
Habit:cleavable masses
Colour:white, grey, beige, pink
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Simpsonite2
Tapiolite-(Fe)2
Beryl1
Thorite1
Ixiolite-(Mn2+)-Ixiolite-(Fe2+) Series1
Data
Mineral Data:Click here to view Microcline data
Locality Data:Click here to view Tanco Mine, Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada
Data Identifiers
Mindat Occurrence Record ID:133889
Long-form Identifier:1:3:133889:8
GUID (UUID V4):0
Nearest other occurrences of Microcline
4.1km (2.6 miles) ⓘPegmatite No. 1, Coe claim, Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada
4.2km (2.6 miles) ⓘPegli pegmatite, Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada
4.3km (2.7 miles) ⓘUnnamed pegmatites, Shatford Lake pegmatites, Shatford Lake, Lac-du-Bonnet area, Manitoba, Canada
4.5km (2.8 miles) ⓘTin Island, Shatford Lake pegmatites, Shatford Lake, Lac-du-Bonnet area, Manitoba, Canada
4.6km (2.8 miles) ⓘPegmatite No. 3, Buck claim, Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada
5.1km (3.2 miles) ⓘDyke 12 claim, Shatford Lake pegmatites, Shatford Lake, Lac-du-Bonnet area, Manitoba, Canada
6.2km (3.8 miles) ⓘShatford Lake pegmatites, Shatford Lake, Lac-du-Bonnet area, Manitoba, Canada
7.2km (4.5 miles) ⓘBunty claims, Shatford Lake pegmatites, Shatford Lake, Lac-du-Bonnet area, Manitoba, Canada
7.2km (4.5 miles) ⓘUnnamed claims [2], Shatford Lake pegmatites, Shatford Lake, Lac-du-Bonnet area, Manitoba, Canada
9.5km (5.9 miles) ⓘBirse Lake Occurrence (Rose), Birse Lake, Lac-du-Bonnet area, Manitoba, Canada
References
153-155.
Hutchinson, Richard W. (1959) Geology of the Montgary pegmatite. Economic Geology, 54 (8). 1525-1542 doi:10.2113/gsecongeo.54.8.1525
Černý, P., Simpson, F. M. (1977) The Tanco Pegmatite at Bernic Lake, Manitoba. IX. Beryl. The Canadian Mineralogist, 15 (4) 489-499
Černý, P., Harris, D. C. (1978) The Tanco pegmatite at Bernic Lake, Manitoba. XI. Native elements, alloys, sulfides and sulfosalts. The Canadian Mineralogist, 16 (4) 625-640
Bannatyne, B.B. (1985) Industrial Minerals in Rare-element Pegmatites of Manitoba. Economic Geology Report ER84-1, Manitoba Energy and Mines Geological Services.
Grice, Joel D. (1989) Bernic Lake, Manitoba: Mining for Space-age Elements. In Famous Mineral Localities of Canada. Fitzhenry & Whiteside Limited & the National Museum of Natural Sciences. p.64-67.
Van Lichtervelde, M., Melcher, F., Wirth, R. (2009) Magmatic vs. hydrothermal origins for zircon associated with tantalum mineralization in the Tanco pegmatite, Manitoba, Canada. American Mineralogist, 94 (4) 439-450 doi:10.2138/am.2009.2952
Alexandre, Paul, Salvi, Stefano (2025) Mineral Chemistry of Li-Bearing Minerals at the Giant Tanco Pegmatite, Canada. Minerals, 15 (3). doi:10.3390/min15030221
Breasley, Catriona M., Martins, Tânia, Linnen, Robert L., Deveau, Claude, Groat, Lee A., Koopmans, Lot, Landry, Emilie, Moser, Desmond (2025) The geochemistry, origins and metallurgical implications of different textural types of spodumene-quartz intergrowths (SQUI) from the Tanco pegmatite, Manitoba, Canada. Ore Geology Reviews, 180. 106577 doi:10.1016/j.oregeorev.2025.106577
 
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