Pikes Peak, Teller Co., Colorado, USA

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Goethite : α-Fe³⁺O(OH)
	Pikes Peak, Teller Co., Colorado, USA These old time Colorado Goethite specimens arguably represent the pinnacle of the species. This specimen consists of radiating cluster of elongated blades of Goethite. The crystals are lustrous and have attractive auburn highlights throughout. Ex. Robert E. Jenkins II Collection No. 8316, from his Colorado suite. Specimen measures 3.55cm x 3.1cm x ...
© Jasun McAvoy	Photo ID: 255466 View Count: 17
Microcline : K[AlSi₃O₈]
	Pikes Peak, Teller Co., Colorado, USA 4.5 x 3.8 x 2.3 cm. Here is a twinned feldspar crystal, very sharp as if carved, that was collected by Ed Over and passed on to his friend Art Montgomery for sale. Art drew on the crystal surfaces to illustrate the twinning crystallography. Ex. Dr. Mark Feinglos Collection.
© Rob Lavinsky	Photo ID: 206839 View Count: 48
Microcline : K[AlSi₃O₈]
	Pikes Peak, Teller Co., Colorado, USA 3.3 x 2.9 x 3.1 cm. Here is a twinned feldspar crystal, very sharp as if carved, that was collected by Ed Over and passed on to his friend Art Montgomery for sale. Art drew on the crystal surfaces to illustrate the twinning crystallography. Ex. Dr. Mark Feinglos Collection.
© Rob Lavinsky	Photo ID: 206841 View Count: 36
Microcline (Var: Amazonite) : K[AlSi₃O₈]
	Pikes Peak, Teller Co., Colorado, USA With preferential overgrowth. Dave Rotor specimen. Tucson 2008.
© J.Ralph	Photo ID: 156554 View Count: 893
Microcline (Var: Amazonite) : K[AlSi₃O₈], Quartz : SiO₂
	Pikes Peak, Teller Co., Colorado, USA Bright blue Amazonite crystals with Smokey Quartz, varying in darkness. 5 cm cluster. Ex. Fannie Price collection.
© J. Wingard	Photo ID: 67126 View Count: 257
Microcline (Var: Amazonite) : K[AlSi₃O₈], Quartz : SiO₂
	Pikes Peak, Teller Co., Colorado, USA Lusterous pale blue Amazonite crystals on graphic granite. 7 cm tall. Ex. Fannie Price collection.
© J. Wingard	Photo ID: 67127 View Count: 228
Microcline (Var: Amazonite) : K[AlSi₃O₈]
	Pikes Peak, Teller Co., Colorado, USA Crystal with 1,5cm - Overall size 3,5x3x2,5cm - October of 2004
© Martins da Pedra	Photo ID: 68828 View Count: 193
Microcline (Var: Amazonite) : K[AlSi₃O₈]
	Pikes Peak, Teller Co., Colorado, USA What makes this Colorado amazonite so nifty is how a smaller, deep blue crystal sits right on the termination of one of the tall crystals, and next to the bright blue and lustrous termination of the second large crystal – giving this piece really super aesthetics I think. The contrast of the light blue with the deeper blue and the sculptural ...
© Rob Lavinsky	Photo ID: 83323 View Count: 173
Microcline (Var: Amazonite) : K[AlSi₃O₈]
	Pikes Peak, Teller Co., Colorado, USA 5.6 x 5.1 x 3.4 cm. This fine Colorado amazonite crystal has it all: not only superb deep robin’s-egg blue color, but beautiful sharp white orthoclase stripes on its bevels as well as a white orthoclase-covered face (whitecap) that make it very distinctive.
© Rob Lavinsky	Photo ID: 166771 View Count: 121
Microcline (Var: Amazonite) : K[AlSi₃O₈], Quartz (Var: Smoky Quartz) : SiO₂
	Pikes Peak, Teller Co., Colorado, USA 10.4 x 10.4 x 5.9 cm. I will say right up front that this large classic combo from Colorado has a number of broken-off smoky quartz crystals. Often these clusters are pretty bashed apart in the pockets and have to be reassembled, and this one apparently could not be gotten out of the ground with the smokies intact. Still, it is very impressive for ...
© Rob Lavinsky	Photo ID: 165041 View Count: 89