Pikes Peak, El Paso Co., Colorado, USA

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Goethite : α-Fe³⁺O(OH)
	Goethite Hill, Pikes Peak, El Paso Co., Colorado, USA Excellent specimen of sprays of lustrous black goethite crystals in aggregates up to 4 cm across. Good old-time specimen dating to the early days of mineral collecting on Pike's Peak. Overall size of mineral specimen: 7x4x4 cm. Size of individual crystals: 5-10 mm.
© 2002 John H. Betts	Photo ID: 5605 View Count: 466
Microcline : K[AlSi₃O₈]
	Pikes Peak, El Paso Co., Colorado, USA Blocky white microcline crystals in sub-parallel formation. There are areas with green tint making this specimen amazonite. Specimen stands upright without stands. Old label attached to bottom from Foote with is address dating the specimen to 1879-1891. Ex. A. E. Foote. Overall size of mineral specimen: 6x5x4 cm. Size of individual crystals: 1-4 ...
© 2002 John H. Betts	Photo ID: 5475 View Count: 1116
Microcline : K[AlSi₃O₈], Quartz (Var: Smoky Quartz) : SiO₂
	Pikes Peak, El Paso Co., Colorado, USA Graphic, intergrown smoky quartz between greenish (almost amazonite) microcline crystals. Minor damage. With old label from the Philadelphia Mineralogical Society auction. Ex. Robert C. Linck (1905-1970). Overall size of mineral specimen: 7x5x4 cm. Size of individual crystals: 5-20 mm.
© 2003 John H. Betts	Photo ID: 9987 View Count: 302
Microcline : K[AlSi₃O₈]
	Pikes Peak, El Paso Co., Colorado, USA A VERY COLORFUL large cluster of amazonite with classic "robin's egg blue" color. Complete all around save for one contact zone at base. GORGEOUS, MORE RICH TURQUOISE-BLUE COLOR IN PERSON! I honestly don't think you could get an equal from contemporary mining for the same price. 9 x 6 x 5.5 cm
© Rob Lavinsky	Photo ID: 21361 View Count: 211
Microcline : K[AlSi₃O₈]
	Pikes Peak, El Paso Co., Colorado, USA Microcline (Amazonite) from Pikes Peak, El Paso County, Colorado In this single crystal the color is magnificent, and the faces are exceptionally well-developed. Size:4.5 x 3.9 x 4.3 cm
© fabreminerals.com	Photo ID: 56549 View Count: 156
Microcline : K[AlSi₃O₈], Quartz (Var: Smoky Quartz) : SiO₂
	Pikes Peak, El Paso Co., Colorado, USA White Microcline with Smoky Quartz. Microcline up to 9mm, Quartz up to 14mm.Specimen size 6x4x4cm. Photo and collection; Jorge M. Alves
© Jorge M. Alves	Photo ID: 87301 View Count: 144
Microcline : K[AlSi₃O₈]
	Pikes Peak, El Paso Co., Colorado, USA 7 cm long microcline crystal. Doug Merson photo and collection.
© DM 07	Photo ID: 85079 View Count: 117
Microcline (Var: Amazonite) : K[AlSi₃O₈]
	Pikes Peak, El Paso Co., Colorado, USA 5.5 x 3.1 x 2.5 cm. Exemplary specimen of what are certainly the finest and best known Amazonites in the world. This cluster has the rich blue color so highly sought after, but not often found. On top of that, the luster is excellent. The largest crystal is almost 2 cm across. Ex. Steve Smale Collection.
© Rob Lavinsky	Photo ID: 119096 View Count: 174
Microcline (Var: Amazonite) : K[AlSi₃O₈]
	Pikes Peak, El Paso Co., Colorado, USA Old specimen of blocky green amazonite crystals without matrix. The crystals are in a parallel formation and are complete around all faces. Hard to photograph - must be seen in person to be appreciated. Overall size of mineral specimen: 8x5x4 cm. Size of individual crystals: 2-5 cm.
© 2002 John H. Betts	Photo ID: 4767 View Count: 533
Microcline (Var: Amazonite) : K[AlSi₃O₈]
	Pikes Peak, El Paso Co., Colorado, USA Old crystal of blocky green amazonite without matrix. The crystal is terminated and complete on the front faces. Hard to photograph - must be seen in person to be appreciated. Good color. Overall size of mineral specimen: 6x4x4 cm. Size of individual crystals: 5 cm.
© 2002 John H. Betts	Photo ID: 5104 View Count: 646