Provenite

Pikes Peak

Natural outcropDraft data

38.8405° N, 105.0442° W · ± 10 km

Microcline from Colorado, United States, with photos of specimens from this locality.

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Minerals found here

Microcline

On the same specimen

Same specimen Quartz with Microcline

1 specimen photo(s) from this locality show microcline with quartz together. The pairing comes from the photographer's file name and label, so the relationship between the two minerals is not specified.

Same specimen Albite with Microcline

1 specimen photo(s) from this locality show microcline with albite together. The pairing comes from the photographer's file name and label, so the relationship between the two minerals is not specified.

Microcline at Pikes Peak

Old amazonite floater crystal labelled 'amazonstone', Pikes Peak.
Old amazonite floater crystal labelled 'amazonstone', Pikes Peak.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Deep blue amazonite crystal with white orthoclase stripes and cap, Pikes Peak.
Deep blue amazonite crystal with white orthoclase stripes and cap, Pikes Peak.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Large symmetrical amazonite crystal, Pikes Peak.
Large symmetrical amazonite crystal, Pikes Peak.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Old-time cluster of large blue-green amazonite crystals, Pikes Peak region.
Old-time cluster of large blue-green amazonite crystals, Pikes Peak region.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Amazonite crystals zoned blue and white with quartz and albite, Pikes Peak.
Amazonite crystals zoned blue and white with quartz and albite, Pikes Peak.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Formula
KAlSi₃O₈
Morphology
Prismatic crystals and clusters, some twinned; old-time floaters
Typical size
Crystals and clusters about 3 to 10 cm
Color / luster
Amazonite: robin's-egg blue to blue-green, some crystals zoned blue and white
Associated minerals
Smoky quartzalbiteorthoclase
Surface features
White orthoclase stripes or caps on some faces
Availability
Unknown
History
Classic old source of amazonite ('amazonstone'); historical specimens collected by Ed Over

Sources: SRC-560 SRC-562 SRC-575

About Microcline →

Geology of the locality

Setting
Pikes Peak granite batholith: Precambrian (about 1.05 Ga) pink granite rich in potassium feldspar, with amazonite-bearing pegmatite pockets.
Host rock
Pikes Peak granite
Region
Colorado
Country
United States

Summit coordinates from Wikipedia. Labels say 'Pikes Peak' in Teller or El Paso County and refer to the wider Pikes Peak region.

Sources: SRC-566

Sources

  1. SRC-566 · Website
    Pikes PeakWikipedia contributors · Wikipedia
  2. SRC-560 · Book
    Handbook of Mineralogy - MicroclineAnthony, J.W.; Bideaux, R.A.; Bladh, K.W.; Nichols, M.C. · 2001 · Mineral Data Publishing / Mineralogical Society of America
  3. SRC-562 · Website
    AmazoniteWikipedia contributors · Wikipedia
  4. SRC-575 · Website
    File:Microcline-207224.jpgRobert M. Lavinsky · Wikimedia Commons

Draft data from the Provenite workbook. Check entries against the cited sources before relying on them. Photos are open-licence images from Wikimedia Commons; the author and licence are given with each photo.