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
Hewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex County, Connecticut, USA


Locality type:Quarry
Classification
Species:Beryl var: Heliodor
Formula:Be3Al2(Si6O18)
Comments:Subhedral crystals to several cm, in aplitic zone or near the intermediate/quartz core zone boundary.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Heliodor data
Locality Data:Click here to view Hewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:689497
Long-form Identifier:1:3:689497:9
GUID (UUID V4):0
Nearest other occurrences of Heliodor
0.6km (0.4 miles) ⓘCivilian Conservation Corps prospect (CCC prospect; Cook columbite prospect), Haddam, Middlesex County, Connecticut, USA
7.1km (4.4 miles) ⓘAnderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
9.4km (5.9 miles) ⓘSlocum prospect, East Hampton, Middlesex County, Connecticut, USA
12.7km (7.9 miles) ⓘBecker Quarry, East Hampton, Middlesex County, Connecticut, USA
16.1km (10.0 miles) ⓘPegmatite prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA
16.9km (10.5 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
17.0km (10.6 miles) ⓘSchoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
19.8km (12.3 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
20.0km (12.4 miles) ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA
22.0km (13.7 miles) ⓘSimpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
References
Shelton, William. (1967): Notes on a Find at Haddam. Rocks and Minerals: 42(7): 502-503.
 
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