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Groutite from
Strickland Quarry (Eureka Quarry), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA

Locality type:Quarry
Classification
Species:Groutite
Formula:Mn3+O(OH)
Comments:Thick black crust on altered lithiophilite with hureaulite and hydroxylapatite.
Habit:massive crust
Colour:black
Quality for species:Poor for species, only of interest for locality collectors. (#)
Abundance at site:Rare
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
References
References:Schooner, Richard. (circa 1985), Untitled manuscript on central Connecticut mineralogy.
Associated Minerals Based on Photo Data:
Hureaulite3 photos of Groutite associated with Hureaulite at this locality.
Elbaite1 photo of Groutite associated with Elbaite at this locality.
Hydroxylapatite1 photo of Groutite associated with Hydroxylapatite at this locality.
Data
Mineral Data:Click here to view Groutite data
Locality Data:Click here to view Strickland Quarry (Eureka Quarry), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
Nearest other occurrences of Groutite
15.0km (9.3 miles) Jail Hill Road locality (Jail Hill Quarry), Haddam, Middlesex Co., Connecticut, USA
 
Mineral and/or Locality  
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