Knox Co., Maine, USA

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Almandine : Fe²⁺₃Al₂[SiO₄]₃
	Union Limestone Quarries (Knox Lime Company Quarries), Union, Knox Co., Maine, USA 4 mm crystal. Collected by Linda Frahm in 2007.
© 2008 Peter Cristofono	Photo ID: 105713 View Count: 151
Almandine : Fe²⁺₃Al₂[SiO₄]₃
	Union Limestone Quarries (Knox Lime Company Quarries), Union, Knox Co., Maine, USA 1 mm transparent pink almandine crystal in matrix. Collected by Linda Frahm, 2007. P. Cristofono photo.
© 2008 Peter Cristofono	Photo ID: 144795 View Count: 115
Andalusite : Al₂[O\|SiO₄]
	Camden, Knox Co., Maine, USA Andalusite crystals in a 5 cm x 7.5 cm rounded beach stone. P. Cristofono specimen and photo. field-collected 2007.
© 2007 Peter Cristofono	Photo ID: 105712 View Count: 141
Andalusite (Var: Chiastolite) : Al₂[O\|SiO₄]
	Camden, Knox Co., Maine, USA 1 cm chiastolite "cross" in a rounded beach stone. P. Cristofono specimen and photo, field-collected 2007.
© 2007 Peter Cristofono	Photo ID: 105711 View Count: 114
Biotite
	Route 105 road cut, Appleton, Knox Co., Maine, USA Fine-grained biotite forming the groundmass of a rare rock called minette in which orthoclase crystals have been found. FOV = 5 x 6 cm.
© Van King	Photo ID: 252667 View Count: 10
Calcite : CaCO₃
	North Pit, Dragon Quarry, Thomaston, Knox Co., Maine, USA Pristine twinned crystals of yellow calcite with complex crystal faces on all sides. The twin plane is quite distinct, though may not show well in the photos. No damage. Overall size of mineral specimen: 22x16x13 mm. Size of individual crystals: 13 mm.
© 2002 John H. Betts	Photo ID: 3966 View Count: 423
Calcite : CaCO₃
	North Pit, Dragon Quarry, Thomaston, Knox Co., Maine, USA Pristine twinned crystals of yellow calcite with complex crystal faces on all sides. The twin plane is quite distinct, though may not show well in the photos. No damage. Overall size of mineral specimen: 3x2.5x1.5 cm. Size of individual crystals: 2 cm.
© 2002 John H. Betts	Photo ID: 3965 View Count: 347
Calcite : CaCO₃
	Rockland, Knox Co., Maine, USA Calcite crystals on matrix. 8.5 x 8.3 x 5.0 cm. Henry Minot photo and collection.
© Henry Minot 2009	Photo ID: 206431 View Count: 55
Fluorite : CaF₂, Calcite : CaCO₃
	Old Country Road locality, Thomaston, Knox Co., Maine, USA Translucent blue-purple fluorite crystals (octahedral) up to 1 mm over scalenohedral calcite crystals up to 4 mm. The fluorite has an excellent color and luster. The calcite fluoresces under UV illumination. Unusual locality. Overall size of mineral specimen: 4x3x1.5 cm. Size of individual crystals: 1-4 mm.
© 2002 John H. Betts	Photo ID: 3969 View Count: 378
Fluorite : CaF₂
	Old Country Road locality, Thomaston, Knox Co., Maine, USA Translucent blue-purple fluorite crystals (octahedral) up to 1 mm on blocky calcite crystals. The fluorite has an excellent color and luster. The calcite fluoresces under UV illumination. This is the best specimen I was able to obtain from this find. Overall size of mineral specimen: 6x5x3 cm. Size of individual crystals: 1-8 mm.
© 2002 John H. Betts	Photo ID: 3984 View Count: 333