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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Pyrochlore Group from
Hale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA


Locality type:Quarry
Classification
Species:'Pyrochlore Group' (not an IMA approved species)
Formula:A2Nb2(O,OH)6Z
Comments:Bruce Jarnot did find and confirm pyrochlore from the Hale Quarry. The single specimen was an aggregate of tapiolite crystals about 0.5 inches that had altered 50% to pyrochlore. It resembled a hard yellow marble that, when split, showed the remains of tapiolite xls in the center. The IDs were made by EDX (element ratios) and X-ray unit crystal pattern.
Colour:yellow
Abundance at site:Extremely Rare
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
Associated Minerals Based on Photo Data:
Tapiolite1
Data
Mineral Data:Click here to view Pyrochlore Group data
Locality Data:Click here to view Hale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:67962
Long-form Identifier:1:3:67962:4
GUID (UUID V4):0
Nearest other occurrences of Pyrochlore Group
1.5km (0.9 miles) ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA
4.1km (2.6 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
15.1km (9.4 miles) ⓘSlocum prospect, East Hampton, Middlesex County, Connecticut, USA
16.8km (10.5 miles) ⓘGillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
References
Jarnot, Bruce M. (1989): Minerals New to the Portland Area Pegmatites of Central Connecticut. Rocks and Minerals, Volume 64 (Nov.-Dec.), p. 471.
 
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