Jefferson Co., New York, USA

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Amphibole Group (Var: Uralite)
	Alexandria Bay, Jefferson Co., New York, USA Long dark green blocky uralite crystals (hornblende altered from pyroxene) to 3 cm long in quartz matrix. There is a single white calcite (?) nestled in between the uralites on one side. Collected many years ago by a well known field collector. Ex. Floyd Faux. Overall size of mineral specimen: 10x8x6 cm. Size of individual crystals: 1-3 cm.
© 2001 John H. Betts	Photo ID: 833 View Count: 826
Amphibole Group (Var: Uralite)
	Alexandria Bay, Jefferson Co., New York, USA Large olive-green blocky uralite crystals (hornblende altered from pyroxene) to 3 cm long in white calcite matrix. Collected many years ago by a well known field collector. Ex. Floyd Faux. Overall size of mineral specimen: 11x7x4 cm. Size of individual crystals: 1-3 cm.
© 2001 John H. Betts	Photo ID: 832 View Count: 513
Apatite-(CaF) : Ca₅[F\|(PO₄)₃], Calcite : CaCO₃
	Moon Lake, Theresa, Theresa Township, Jefferson Co., New York, USA Doubly-terminated blue crystal of fluorapatite in white calcite matrix. The fluorapatite crystal has a smooth, rounded shape resembling a melted candle (very cool!). No damage. Overall size of mineral specimen: 25x25x18 mm. Size of individual crystals: 25 mm.
© 2002 John H. Betts	Photo ID: 7081 View Count: 393
Calcite : CaCO₃
	Oxbow, Jefferson Co., New York, USA Elongated plate of yellow, scalenohedral calcite crystals up to 2 cm long. Many crystals are doubly terminated. There is a square cast in the matrix, likely from a galena crystal that corroded away. Ex. NY State Museum. Overall size of mineral specimen: 11x5x5 cm. Size of individual crystals: 5-20 mm.
© 2001 John H. Betts	Photo ID: 1842 View Count: 334
Fluorite : CaF₂
	Muscalonge Lake fluorite deposit, Oxbow, Theresa Township, Jefferson Co., New York, USA New York State Museum, specimen no. 22421. Ex- Philadelphia Academy of Sciences collection. P. Cristofono photo.
© 2008 Peter Cristofono	Photo ID: 163800 View Count: 87
Hornblende
	Natural Bridge, Wilna Township, Jefferson Co., New York, USA Large black terminated crystals of hornblende in white calcite matrix. Classic location. Ex Cascardden Coll.. Overall size of mineral specimen: 7x6x6cm. Size of individual crystals: 1-5cm.
© 2001 John H. Betts	Photo ID: 834 View Count: 3171
Millerite : NiS
	Sterling mine, Antwerp, Jefferson Co., New York, USA Millerite crystals in a vug. Specimen is from the Canfield collection #C494 at the Smithsonian Institute, Washington DC. USA. Scale at the bottom of the image is an inch with a rule at one cm. One of the finest of its kind.
	Photo ID: 219364 View Count: 117
Millerite : NiS
	Sterling mine, Antwerp, Jefferson Co., New York, USA Acicular millerite crystals in a vug. View is 4 mm across. Ex- Michael Shih collection. P. Cristofono specimen and photo.
© 2009 Peter Cristofono	Photo ID: 239018 View Count: 63
Muscovite (Var: Gieseckite) : KAl₂[(OH)₂\|AlSi₃O₁₀]
	Natural Bridge gieseckite locality, Natural Bridge, Wilna Township, Jefferson Co., New York, USA Specimen size is 7.2 x 6.6 x 2.8 cm. Here is a recent acquisition, a really nice example of the Natural Bridge, New York pseudomorph known locally as gieseckite. Gieseckite is a muscovite varietal (in accordance with Mindat.org) and represents a pseudomorph after an unknown mineral, although other sources have it as illite (approved 1998). Some ...
© Ron Gyllenhammer	Photo ID: 205729 View Count: 187
Siderite : FeCO₃, Stilpnomelane : (K,Ca,Na)(Fe²⁺,Mg,Al,Fe³⁺)₈(Si,Al)₁₂(O,OH)₃₆ · nH₂O
	Sterling mine, Antwerp, Jefferson Co., New York, USA An aesthetic specimen of lustrous, honey-brown siderite crystals to 7 mm nestled in a vug with radial clusters of brown, micro stilpnomelane crystals in sulfide matrix from the very famous Sterling Mine in Antwerp, New York. Choice and old material, seldom available today. 5.5 x 3.6 x 3.5 cm
© Rob Lavinsky	Photo ID: 38073 View Count: 308