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Hyalophane from
Jail Hill Road locality (Jail Hill Quarry), Haddam, Middlesex Co., Connecticut, USA

Species:Microcline var: Hyalophane
Comments:"A few nicely formed yellowish hyalophane crystals (adularia type) were found in vugs of spessartine crystals at the Jail Hill quarry in Haddam, associated with a lens of manganese silicates and oxides. Spectrographic analysis indicates the hyalophane is manganoan." Schooner (circa 1985). Crystals reach about 1 cm.
Colour:pale yellow-white
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Very Rare
Confirmation Methods:Infrared Spectroscopy
References:Schooner, Richard. (circa 1980s), Untitled manuscript on central Connecticut minerals.
Associated Minerals Based on Photo Data:
Spessartine1 photo of Hyalophane associated with Spessartine at this locality.
Mineral Data:Click here to view Hyalophane data
Locality Data:Click here to view Jail Hill Road locality (Jail Hill Quarry), Haddam, Middlesex Co., Connecticut, USA
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