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Astrophyllite : (K,Na)3(Fe,Mn)7Ti2Si8O24(O,OH)7 | |
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St Peters Dome, Cheyenne District (St. Peters Dome District), El Paso Co., Colorado, USA Inch ruler shows the scale on this piece of quartz/orthoclase pegmatite full of golden colored cleavages of astrophyllite. Specimen in the collection of Charles Creekmur. |
| © Charles Creekmur | Photo ID: 17542 View Count: 428 |
Astrophyllite : (K,Na)3(Fe,Mn)7Ti2Si8O24(O,OH)7 | |
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Stove Mountain Mineral Locality (Cook Stove Mountain Mineral Locality), Cheyenne District (St. Peters Dome District), El Paso Co., Colorado, USA A fine crystallized cabinet example for this species from Colorado! A 10 x 9.6 x 5 cm matrix is hosting numerous bronze colored prismatic crystals of astrophyllite, these frozen throughout. Ex Don Belsher collection; his data card comes with this one dating the piece to 1946. |
| © Dan Weinrich | Photo ID: 136054 View Count: 129 |
Astrophyllite : (K,Na)3(Fe,Mn)7Ti2Si8O24(O,OH)7, Riebeckite : [ ][Na2][Fe2+3Fe3+2][(OH)2|Si8O22] | |
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St Peters Dome, Cheyenne District (St. Peters Dome District), El Paso Co., Colorado, USA Dimensions 68mm x 20mm x 47mm Collected July 2008 above Gold Camp Rd. Tunnel #4. 'brass' Astrophyllite and black Riebeckite on Quartz. -Dean Allum |
| Photo ID: 199085 View Count: 97 | |
Astrophyllite : (K,Na)3(Fe,Mn)7Ti2Si8O24(O,OH)7 | |
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St Peters Dome, Cheyenne District (St. Peters Dome District), El Paso Co., Colorado, USA 2.5 x 0.7 x 0.2 cm. A lustrous, metallic foil-like, golden-bronze astrophyllite blade from a famous Colorado locality - St. Peters Dome. Astrophyllite is a RARE titanium silicate and this is an LARGE, outstanding, free-standing crystal of the species and locality. Ex. Dick Jones Collection and certainly an older specimen. |
| © Rob Lavinsky | Photo ID: 168705 View Count: 81 |
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St Peters Dome, Cheyenne District (St. Peters Dome District), El Paso Co., Colorado, USA 10.3 x 8.0 x 6.0 cm. Lustrous, diverging, metallic foil-like, golden-bronze astrophyllite blades are richly and superbly set in cabinet-sized pegmatite matrix from this well-known Colorado locality - St. Peters Dome. Astrophyllite is a rare potassium, sodium, iron, manganese, titanium silicate and these are large, up to 6.0 cm, crystals of the ... |
| © Rob Lavinsky | Photo ID: 213102 View Count: 44 |
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St Peters Dome, Cheyenne District (St. Peters Dome District), El Paso Co., Colorado, USA Large agregate of sub-metallic bronze Astrophyllite crystals in pegmatite of alkaline granites. Associating minerals are dark-brown Cyrtolite xls (red arrowed on the one of daughter photos), K-feldspars, Aegirine and Quartz. Specimen size is 7.5x5x3 cm. Collected by Dean Allum on pegmatite 60-3 in 2009. Pavel M. Kartashov collection and photo. |
| © Pavel M. Kartashov | Photo ID: 243545 View Count: 40 |
Astrophyllite : (K,Na)3(Fe,Mn)7Ti2Si8O24(O,OH)7 | |
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Stove Mountain Mineral Locality (Cook Stove Mountain Mineral Locality), Cheyenne District (St. Peters Dome District), El Paso Co., Colorado, USA Specimen size is 15x6x3 cm. A fibrous mass of astrophyllite needles forms a 1 cm thick layer on feldspar. A few scattered orange spots of ferrithorite can also be seen. Collected June 2009 by Dean Allum. |
| Photo ID: 239360 View Count: 28 | |
Astrophyllite : (K,Na)3(Fe,Mn)7Ti2Si8O24(O,OH)7, Zircon : Zr[SiO4] | |
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St Peters Dome, Cheyenne District (St. Peters Dome District), El Paso Co., Colorado, USA 5.9 x 4.2 x 3.5 cm. Lustrous, parallel-growth, metallic foil-like, golden-bronze astrophyllite blades are richly set in quartz-rich pegmatite matrix from a famous Colorado locality - St. Peters Dome. Astrophyllite is a rare titanium silicate and these are fairly large crystals of the species and for the locality. One face is superbly accented with ... |
| © Rob Lavinsky | Photo ID: 255052 View Count: 12 |
Astrophyllite : (K,Na)3(Fe,Mn)7Ti2Si8O24(O,OH)7 | |
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St Peters Dome, Cheyenne District (St. Peters Dome District), El Paso Co., Colorado, USA 4 cm crystals of astrophyllite. S411-217 Excalibur Mineral specimen. |
| © 2009, JGW | Photo ID: 253805 View Count: 7 |
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St Peters Dome, Cheyenne District (St. Peters Dome District), El Paso Co., Colorado, USA SEM image of plumboan Cerianite-(Ce) precipitations over plates of Muscovite. Cerianite here is wide spread product of alteration of primary monazite-(Ce). All specimens from this point of mineralization are covered by microscopic films of cerianite with significant contents of Pb or Pb and Th. Associating minerals in the specimen (invisible on ... |
| © Pavel M. Kartashov | Photo ID: 250565 View Count: 41 |
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