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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Tourmaline from
Simpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA


05042980017414512866599.jpg
Schorl, etc.

Simpson Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
03373030017272047269597.jpg
Schorl, etc.

Simpson Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
08765160017272047266988.jpg
Schorl, etc.

Simpson Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
03992620017364585457463.jpg
Schorl, etc.

Simpson Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
05679610017411419178308.jpg
Schorl, etc.

Simpson Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
07766610017364585453169.jpg
Schorl, etc.

Simpson Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
00778270017364585469775.jpg
Schorl, etc.

Simpson Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
03992620017364585457463.jpg
Schorl, etc.

Simpson Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
05148240017414512874740.jpg
Schorl, etc.

Simpson Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
04901990017271971878863.jpg
Schorl, etc.

Simpson Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
08765160017272047266988.jpg
Schorl, etc.

Simpson Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
03992620017364585457463.jpg
Schorl, etc.

Simpson Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
Locality type:Quarry
Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:AD3G6(T6O18)(BO3)3X3Z
Comments:Unterminated prisms with cleavelandite, lepidolite, quartz, can be translucent with small gemmy portions.
Habit:subhedral prismatic, parallel aggregates
Colour:green
Abundance at site:Rare
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view Simpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:775665
Long-form Identifier:1:3:775665:8
GUID (UUID V4):0
Nearest other occurrences of Tourmaline
0.5km (0.3 miles) ⓘHollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
1.3km (0.8 miles) ⓘHale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
2.3km (1.5 miles) ⓘGotta-Walden Prospect, Portland, Middlesex County, Connecticut, USA
2.4km (1.5 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
5.3km (3.3 miles) ⓘSchoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
5.4km (3.3 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
6.2km (3.8 miles) ⓘHale-Walker prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA
6.8km (4.3 miles) ⓘBrack Gem prospect (Brack prospect), East Glastonbury, Glastonbury, Hartford County, Connecticut, USA
7.9km (4.9 miles) ⓘGreat Hill cobalt mines, Cobalt, East Hampton, Middlesex County, Connecticut, USA
9.7km (6.0 miles) ⓘWhite Rocks Quarry (Consolidated Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA
References
Various field collectors
 
and/or  
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