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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Talc from
Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA


01190540017272036209779.jpg
Talc

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
01405400017272022593541.jpg
Talc

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
08743550017364394621136.jpg
Talc

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
09095840017407652112346.jpg
Talc, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
01190540017272036209779.jpg
Talc

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
00875100017364394631628.jpg
Talc

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
08743550017364394621136.jpg
Talc

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
05093990017370988745471.jpg
Talc, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
01190540017272036209779.jpg
Talc

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
01405400017272022593541.jpg
Talc

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
04699910017364394636376.jpg
Talc

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
09095840017407652112346.jpg
Talc, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
Locality type:Quarry
Classification
Species:Talc
Formula:Mg3Si4O10(OH)2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Calcite5
Albite3
Dolomite3
Coalingite2
Magnetite2
Clinochlore2
Data
Mineral Data:Click here to view Talc data
Locality Data:Click here to view Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
Photo GalleryView Gallery (7 photos)
Data Identifiers
Mindat Occurrence Record ID:46617
Long-form Identifier:1:3:46617:2
GUID (UUID V4):0
Nearest other occurrences of Talc
4.3km (2.7 miles) ⓘUnnamed Talc Prospect, Seneca, Montgomery County, Maryland, USA
5.4km (3.3 miles) ⓘTschiffely (Wheatlands) Aggregate Quarry, Montgomery County, Maryland, USA
7.4km (4.6 miles) ⓘGaithersburg, Montgomery County, Maryland, USA
8.6km (5.4 miles) ⓘHuddlestone Mine, Rockville, Montgomery County, Maryland, USA
9.2km (5.7 miles) ⓘMaryland Mine (Allen shaft), Potomac, Montgomery County, Maryland, USA
10.8km (6.7 miles) ⓘBull Neck Mine, Bull Neck Run, Gold-Pyrite Belt, Fairfax County, Virginia, USA
13.6km (8.5 miles) ⓘJenkins Farm Prospect, Fairfax County, Virginia, USA
17.2km (10.7 miles) ⓘWiehle, Fairfax County, Virginia, USA
18.1km (11.2 miles) ⓘ46th street roadcut, NW Washington, District of Columbia (Washington D.C.), USA
20.6km (12.8 miles) ⓘEtchison Mine, Montgomery County, Maryland, USA
References
Bernstein, Lawrence R. (1980) Minerals of the Washington, D.C. Area - Issue 5 of Educational series, Maryland Geological Survey. Department of Natural Resources, Maryland Geological Survey. p.1-148.
 
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