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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Heliodor from
Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA


Locality type:Quarry
Classification
Species:Beryl var: Heliodor
Formula:Be3Al2(Si6O18)
Habit:massive to subhedral hexagonal crystals
Colour:yellow
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Heliodor data
Locality Data:Click here to view Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:654686
Long-form Identifier:1:3:654686:1
GUID (UUID V4):0
Nearest other occurrences of Heliodor
0.1km (0.1 miles) ⓘSchoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
0.8km (0.5 miles) ⓘPegmatite prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA
3.0km (1.8 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
3.8km (2.3 miles) ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA
5.4km (3.3 miles) ⓘSimpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
10.1km (6.3 miles) ⓘBecker Quarry, East Hampton, Middlesex County, Connecticut, USA
10.2km (6.4 miles) ⓘAnderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
12.0km (7.5 miles) ⓘSlocum prospect, East Hampton, Middlesex County, Connecticut, USA
16.3km (10.1 miles) ⓘCivilian Conservation Corps prospect (CCC prospect; Cook columbite prospect), Haddam, Middlesex County, Connecticut, USA
16.9km (10.5 miles) ⓘHewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex County, Connecticut, USA
References
USGS Professional Paper 255: 333-338.
Cameron, Eugene N., Larrabee, David M., McNair, Andrew H., Page, James J., Stewart, Glen W., Shainin, Vincent E. (1954) Pegmatite Investigations, 1942-45, in New England. Geological Survey Professional Paper 255. US Geological Survey doi:10.3133/pp255
 
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