Chester, Middlesex Co., Connecticut, USA

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Sillimanite : Al₂[O\|SiO₄]
	Chester, Middlesex Co., Connecticut, USA 12.4 x 7.1 x 2.7 cm. A large specimen of the mineral sillimanite, named surely near the time this was found after Professor Silliman of Yale, with 3-dimensional but embedded crystals. Ex. Charles Shepherd Collection (1804-1886), whom according to the Mineralogical Record Archive on him was with Benjamin Silliman's staff at Yale in 1827, as his ...
© Rob Lavinsky	Photo ID: 199678 View Count: 92

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Chester, Middlesex Co., Connecticut, USA

Sillimanite : Al2[O|SiO4]

Sillimanite : Al₂[O|SiO₄]