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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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Hornblende Root Name Group from
Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA


02519740017272018213637.jpg
Hornblende Root Name Group, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
04990480017367674972013.jpg
Hornblende Root Name Group, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
09958360017367674984341.jpg
Hornblende Root Name Group, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
01361750017367675006517.jpg
Hornblende Root Name Group, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
08811250017367675003622.jpg
Hornblende Root Name Group, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
04990480017367674972013.jpg
Hornblende Root Name Group, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
09958360017367674984341.jpg
Hornblende Root Name Group, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
01361750017367675006517.jpg
Hornblende Root Name Group, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
02519740017272018213637.jpg
Hornblende Root Name Group, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
03506540017272016431838.jpg
Hornblende Root Name Group, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
07112740017367675016396.jpg
Hornblende Root Name Group, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
02620370017272016459216.jpg
Hornblende Root Name Group, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
Locality type:Mine
Classification
Species:'Hornblende Root Name Group' (not an IMA approved species)
Formula:◻Ca2(C42+C3+)(AlSi7O22)W2
Comments:Occurs in large black and green cleavable masses. Small crystals up to 2 cm. are uncommon; also found in fibrous and acicular crystals
Habit:cleavable masses
Colour:black, green
Quality for species:Rock forming mineral/non-crystalline/little interest for collectors.(##)
Abundance at site:Common
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Epidote2
Calcite2
Magnetite2
Marble1
Albite1
Clinozoisite1
Pyroxene Group1
Data
Mineral Data:Click here to view Hornblende Root Name Group data
Locality Data:Click here to view Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
Photo GalleryView Gallery (3 photos)
Data Identifiers
Mindat Occurrence Record ID:100209
Long-form Identifier:1:3:100209:6
GUID (UUID V4):0
Nearest other occurrences of Hornblende Root Name Group
1.9km (1.2 miles) ⓘInterstate 84 road cuts, Town of Southeast, Putnam County, New York, USA
10.1km (6.2 miles) ⓘMahopac Mines, Town of Carmel, Putnam County, New York, USA
15.5km (9.6 miles) ⓘNorth Street mall, Danbury, Fairfield County, Connecticut, USA
19.2km (12.0 miles) ⓘAgstone Company Limestone Quarry, Danbury, Fairfield County, Connecticut, USA
20.1km (12.5 miles) ⓘCroft Mine, Oscawana Corners, Town of Putnam Valley, Putnam County, New York, USA
21.0km (13.1 miles) ⓘU. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA
22.9km (14.2 miles) ⓘShaft 7, Delaware Aqueduct, Town of Fishkill, Dutchess County, New York, USA
23.2km (14.4 miles) ⓘBedford, Westchester County, New York, USA
23.4km (14.5 miles) ⓘFillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA
30.1km (18.7 miles) ⓘOre loading dock, Fort Montgomery, Town of Highlands, Orange County, New York, USA
References
 
and/or  
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