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Actinolite-Tremolite Series

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About Actinolite-Tremolite SeriesHide

Crystal System:
Series Formula:
☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2 to ☐{Ca2}{Mg5}(Si8O22)(OH)2
A series between Actinolite and Tremolite

Tremolite is defined as having an Mg/(Mg+Fe2+) ratio ≥ 0.9; actinolite has a ratio of 0.5–0.9 and ferro-actinolite has a ratio of less than 0.5.

Crystallography of Actinolite-Tremolite SeriesHide

Crystal System:

Common AssociatesHide

Associated Minerals Based on Photo Data:
Calcite8 photos of Actinolite-Tremolite Series associated with Calcite on mindat.org.
Vigezzite6 photos of Actinolite-Tremolite Series associated with Vigezzite on mindat.org.
Quartz6 photos of Actinolite-Tremolite Series associated with Quartz on mindat.org.
Hessonite6 photos of Actinolite-Tremolite Series associated with Hessonite on mindat.org.
Magnetite4 photos of Actinolite-Tremolite Series associated with Magnetite on mindat.org.
Pyrite2 photos of Actinolite-Tremolite Series associated with Pyrite on mindat.org.
Albite1 photo of Actinolite-Tremolite Series associated with Albite on mindat.org.
Grossular1 photo of Actinolite-Tremolite Series associated with Grossular on mindat.org.
Smoky Quartz1 photo of Actinolite-Tremolite Series associated with Smoky Quartz on mindat.org.
Diopside1 photo of Actinolite-Tremolite Series associated with Diopside on mindat.org.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Actinolite-Tremolite SeriesHide

Localities for Actinolite-Tremolite SeriesHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • South Australia
    • Mt Lofty Ranges
      • North Mt Lofty Ranges
        • Burra
Collection of Mark Willoughby
  • Carinthia
    • Karawanken
      • Bad Eisenkappel (Bad Eisenkappl)
        • Ebriach
C.Auer (2017)
  • Ontario
    • Haliburton Co.
      • Cardiff Township
Anne P. Sabina (1986) Rocks and Minerals for the Collector, Bancroft-Parry Sound and South Eastern Ontario
      • Dudley Township
Van King
      • Lutterworth Township
Canadian Museum of Nature data
    • Hastings Co.
      • Monteagle Township
        • Musclow Greenview Road roadcuts
Andrew Debnam collection
  • Québec
    • Outaouais
      • Gatineau TE
        • Gatineau Park
Matt Courville collection
  • Valparaíso
    • Petorca Province
Maksaev, V., Townley, B., Palacios, C., and Camus, F. (2007): Metallic ore deposits. In: Moreno, T., and Gibbons, W. (editors): The Geology of Chile. The Geological Society (London), pp. 414.
  • Auvergne-Rhône-Alpes
    • Savoie
      • La Lauzière massif
DE ASCENCAO GUEDES R.. (2000). La Lauzière : les espèces minérales, Savoie, France. Le Règne Minéral hors-série n°6, pp. 24-39. Editions du Piat.
DE ASCENCAO GUEDES R.. (2000). La Lauzière : les espèces minérales, Savoie, France. Le Règne Minéral hors-série n°6, pp. 24-39. Editions du Piat.
  • Saxony-Anhalt
    • Harz
      • Thale
        • Friedrichsbrunn
Thomas Lühr
  • Tuscany
    • Livorno Province
      • Elba Island
        • Rio Marina
Pandeli, E., Principi, G., Bortolotti, V., Benvenuti, M., Fazzuoli, M., Dini, A., Fanucci, F., Menna, F., Nirta, G. (2013): The Elba Island: an intriguing geological puzzle in the Northern Tyrrhenian Sea. 85° Congresso Nazionale della Società Geologica Italiana, Pisa 6-8 settembre 2010. Geological Field Trips, Vol. 5, No. 2.1, 144 pp.
    • Lucca Province
      • Garfagnana
        • San Romano Garfagnana
Biagioni, C. (2009). Minerali della Provincia di Lucca. Associazione Micro-Mineralogica Italiana, Cremona, 352 pp.
    • Metropolitan City of Florence
      • Firenzuola
        • Futa Pass area
          • Monte Beni
Bardi, T., Becucci, A. & Biagioni, C. (2012): Monte Beni - I minerali dell'ex cava Fantoni (Pietramala, Firenzuola, Firenze). MICRO, 3/2012, 98-109.
  • Buskerud
    • Kongsberg
Van der Wel, D. (1972): Contribution to the Mineralogy of Norway No. 51. Asbestos minerals from Kongsberg silver deposit. Norsk Geologisk Tidsskrift 52: 287-294
        • Overberget Mining Field
Nordrum, F.S.(1999): Nyfunn av mineraler i Norge 1998-1999. Norsk Bergverksmuseum Skrift 15: 87-90
  • Örebro County
    • Hällefors
      • Uvberget
Wilke, H.-J. (1976): Mineral-Fundstellen Band 4: Skandinavien. Chr. Weise Verlag, München, 370 pp. (p. 197-198)
Wilke, H.-J. (1976): Mineral-Fundstellen Band 4: Skandinavien. Chr. Weise Verlag, München, 370 pp. (p. 197-198)
  • Värmland County
    • Filipstad
      • Persberg ore district
        • Pajsberg
Nysten, P. (1984): Kleinod des Nordens - Harstigen in Schweden. Magma 2/1984, 12-30.
  • Västmanland County
    • Skinnskatteberg
      • Riddarhyttan
        • Bastnäs Mines
Holtstam, D., Bindi, L., Hålenius, U., Andersson, U.B. (2017): Delhuyarite-(Ce) Ce4Mg(Fe3+2W)□(Si2O7)2O6(OH)2 a new mineral of the chevkinite group, from the Nya Bastnäs Fe–Cu–REE deposit, Sweden. European Journal of Mineralogy, 29, 897-905
  • Valais
    • Binn Valley
"Amir Akhavan" collection
  • England
    • Cornwall
      • Grade-Ruan
        • Kennack
          • Kennack Cove (Kennack Sands)
Alysson Rowan Collection
  • California
    • Santa Cruz Co.
      • Santa Cruz Mts
        • Ben Lomond Mountain
Leo, G.W. (1967) The plutonic and metamorphic rocks of the Ben Lomond Mountain area, Santa Cruz County, California. California Division of Mines and Geology Special Report 91: 41; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 399.
  • Massachusetts
    • Middlesex Co.
P. Cristofono collection
P. Cristofono collection
  • Oregon
    • Coos Co.
      • Bandon
Alt, D., and Hyndman, D., 1978, Roadside Geology of Oregon: Missoula, Mountain Press, p. 97-98.
  • Washington
    • King Co.
      • North Bend
        • Hansen Creek
T Douglas Schonewald Collection
Mineral and/or Locality  
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