Offretite

Offretite

Zaječí hill, Arnultovice, Nový Bor, Česká Lípa District, Liberec Region, Czech Republic

Offretite

Roßberg Quarry, Roßdorf, Darmstadt-Dieburg, Darmstadt, Hesse, Germany

Offretite

Herbstein basalt quarry, Herbstein, Vogelsbergkreis, Giessen Region, Hesse, Germany

Offretite

Zaječí hill, Arnultovice, Nový Bor, Česká Lípa District, Liberec Region, Czech Republic

Offretite

Roßberg Quarry, Roßdorf, Darmstadt-Dieburg, Darmstadt, Hesse, Germany

Offretite

Herbstein basalt quarry, Herbstein, Vogelsbergkreis, Giessen Region, Hesse, Germany

Offretite

Zaječí hill, Arnultovice, Nový Bor, Česká Lípa District, Liberec Region, Czech Republic

Offretite

Roßberg Quarry, Roßdorf, Darmstadt-Dieburg, Darmstadt, Hesse, Germany

About OffretiteHide

Albert J. J. Offret

Formula:

KCaMg(Si₁₃Al₅)O₃₆ · 15H₂O

Colour:

Colorless, white

Lustre:

Vitreous

Hardness:

4 - 4½

Specific Gravity:

2.13

Crystal System:

Hexagonal

Member of:

Zeolite Group

Name:

Named in honor of Albert Jules Joseph Offret (24 October 1857, Douai, France - 4 March 1933, Lyon, France), professor at the University of Lyon, France.

Type Locality:

ⓘ Mont Semiol, Châtelneuf, Montbrison, Loire, Auvergne-Rhône-Alpes, France

Zeolite Group.

A zeolite difficult to distinguish from erionite.

NOTE: The zeolite mineral species epitaxially overgrown on lévyne in all cases is identified as erionite (Passaglia et al., 1998).

Unique IdentifiersHide

IMA Classification of OffretiteHide

Classification of OffretiteHide

Mineral SymbolsHide

Physical Properties of OffretiteHide

Optical Data of OffretiteHide

Type:

Uniaxial (-)

RI values:

n_ω = 1.489 - 1.495 n_ε = 1.486 - 1.492

Max Birefringence:

δ = 0.003

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Moderate

Chemistry of OffretiteHide

Crystallography of OffretiteHide

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0002005	Offretite	Gualtieri A, Artioli G, Passaglia E, Bigi S, Viani A, Hanson J C (1998) Crystal structure-crystal chemistry relationships in the zeolites erionite and offretite Sample from Mt. Semiol American Mineralogist 83 590-606		1998		0	293
0002006	Offretite	Gualtieri A, Artioli G, Passaglia E, Bigi S, Viani A, Hanson J C (1998) Crystal structure-crystal chemistry relationships in the zeolites erionite and offretite Sample #1 from Fitta American Mineralogist 83 590-606		1998		0	293
0002007	Offretite	Gualtieri A, Artioli G, Passaglia E, Bigi S, Viani A, Hanson J C (1998) Crystal structure-crystal chemistry relationships in the zeolites erionite and offretite Sample #2 from Fitta American Mineralogist 83 590-606		1998		0	293

CIF Raw Data - click here to closedata_global _chemical_name_mineral 'Offretite' loop_ _publ_author_name 'Gualtieri A' 'Artioli G' 'Passaglia E' 'Bigi S' 'Viani A' 'Hanson J C' _journal_name_full 'American Mineralogist' _journal_volume 83 _journal_year 1998 _journal_page_first 590 _journal_page_last 606 _publ_section_title ; Crystal structure-crystal chemistry relationships in the zeolites erionite and offretite Sample from Mt. Semiol ; _database_code_amcsd 0002005 _chemical_formula_sum '(Si12.78 Al5.22) Ca1.4 K Mg O49.52 H27.04' _cell_length_a 13.293 _cell_length_b 13.293 _cell_length_c 7.608 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 1164.252 _exptl_crystal_density_diffrn 2.052 _symmetry_space_group_name_H-M 'P -6 m 2' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,x-y,-z' '-x+y,-x,-z' '-y,-x,z' '-y,x-y,z' '-x+y,y,-z' 'x,y,-z' 'x,x-y,z' '-x+y,-x,z' '-y,-x,-z' '-y,x-y,-z' '-x+y,y,z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy _atom_site_U_iso_or_equiv Si1 -0.00040 0.23080 0.20670 0.71000 0.02800 Al1 -0.00040 0.23080 0.20670 0.29000 0.02800 Si2 0.09190 0.42100 0.50000 0.71000 0.03000 Al2 0.09190 0.42100 0.50000 0.29000 0.03000 Ca1 0.66667 0.33333 0.35300 0.43000 0.06700 Ca2 0.66667 0.33333 0.24500 0.27000 0.05200 K 0.00000 0.00000 0.50000 1.00000 0.04000 Mg 0.33333 0.66667 0.00000 1.00000 0.02600 O1 0.02670 0.34760 0.31880 1.00000 0.03000 O2 0.09420 0.90560 0.23400 1.00000 0.01600 O3 0.88490 0.11510 0.28070 1.00000 0.02600 O4 0.00930 0.27220 0.00000 1.00000 0.03200 O5 0.22710 0.77290 0.50000 1.00000 0.01000 O6 0.45450 0.54550 0.50000 1.00000 0.05100 Wat1 0.33333 0.66667 0.25870 1.00000 0.04300 Wat2 0.24370 0.75630 0.00000 0.80000 0.04100 Wat3 0.17400 0.49570 0.00000 0.30000 0.06000 Wat4 0.75790 0.24210 0.50000 1.00000 0.05800 Wat5 -0.43570 0.43570 0.17130 0.35000 0.04200 Wat5b -0.48200 0.48200 0.12310 0.37000 0.04200

Epitaxial Relationships of OffretiteHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of OffretiteHide

Synonyms of OffretiteHide

Other Language Names for OffretiteHide

Relationship of Offretite to other SpeciesHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for OffretiteHide

References for OffretiteHide

Localities for OffretiteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Argentina
Chubut Province Futaleufú Department ⓘ Futalaufquen Lake	R. S. Bowman and S. E. Delap (Eds.)
Australia
New South Wales Brisbane Co. Merriwa ⓘ Willy Wally Gully	England et al. (1988) +1 other reference
Buckland Co. ⓘ Borambil	England (1996)
ⓘ Krui Valley	England (2002)
Queensland Lockyer Valley Region Gatton Valley ⓘ Laidley Creek	Brian Camey
Tasmania Central Coast municipality ⓘ Leith ?	www.crocoite.com (2003)
Devonport City municipality Devonport district ⓘ Don Hill ?	www.crocoite.com (2003)
Kentish municipality Moina - Middlesex District ⓘ Mt Stormont	Bottrill et al. (2008)
Victoria Bass Coast Shire Phillip Island ⓘ Berrys Beach	Birch (1989)
ⓘ Red Bluff	Birch (1989)
ⓘ Redcliff Head (Red Cliff Head)	Birch (1988)
ⓘ Sunderland Bluff	Birch (1988)
Baw Baw Shire Jindivick ⓘ Basalt quarry	W.D.Birch 1987. Zeolites from Jindivick +2 other references
Willow Grove ⓘ Blue Rock Dam (Blue Rock quarry)	Birch (1989)
Flinders area ⓘ Simmons Bay ?	Henderson et al. (1986)
Mornington Peninsula Shire Flinders area ⓘ Cairns Bay ?	Tschernich (1992)
Wellington Shire Howitt Plains ⓘ Road metal quarry ?
Austria
Styria Südoststeiermark District Klöch ⓘ Basalt quarry	Postl et al. (1996) +1 other reference
Canada
British Columbia Kamloops Mining Division Monte Lake Monte Hills ⓘ Twigg Creek (Twig Creek)	Tschernich (1992)
Westwold ⓘ Douglas Lake Road	Tschernich (1992)
Similkameen Mining Division Coalmont ⓘ Blakeburn	Tschernich (1992)
Costa Rica
Guanacaste Province ⓘ La Cruz Canton	Micro Probe Vol 7 No. 7 Spring 1993
Limón Province Matina Canton ⓘ Río Barbilla	Micro Probe Volume VII Number 7 Spring ... +2 other references
San José Province ⓘ Alto de Guayacán	Zeledón (2004)
ⓘ Calle Petróleo	Zeledón (2004)
Puriscal Canton Candelarita District ⓘ Pedernal Road cuts	Micro Probe Volume VII Number 7 Spring ... +1 other reference
Czech Republic
Central Bohemian Region Kladno District ⓘ Vinařice	Pauliš +2 other references
Mladá Boleslav District Bela pod Bezdezem ⓘ Lysá hora (Hill)	Ing. O. Janeček - New localities of ...
Hradec Králové Region Jičín District Vidochov Stupná ⓘ Supí hill	Veselovský
Liberec Region Česká Lípa District Česká Lípa Heřmaničky ⓘ Kluček hill	Bulletin Mineralogie Petrologie vol.26 +1 other reference
ⓘ Okřešice	Pauliš et al. (2017)
ⓘ Lískový Hill	Pauliš et al. (2017)
Cvikov ⓘ Rousínov castle	P.Pauliš et al. (2015)
ⓘ Unnamed hill	L.Hrůzek +1 other reference
Kamenický Šenov ⓘ Nový svět	L.Hrůzek.O.Janeček-Personal reference
Nový Bor Arnultovice ⓘ Zaječí hill	Pauliš et al. (2019)
Nový Oldřichov ⓘ Mistrovice	Petr Fuchs +1 other reference
Okrouhlá ⓘ Klučky-Hillside (Stráň)	Libor Hrůzek-Personal reference
ⓘ Klučky-Parking	Libor Hrůzek-Personal reference
ⓘ Klučky-Trojmezí	Libor Hruzek
Polevsko ⓘ Poustevna	Pauliš et al. (2019)
ⓘ Wachstein	Libor Hrůzek-Personal reference +1 other reference
ⓘ Prysk	J.E.Hibsch-Die Minerale des Böhmischen Mittelgebirges (Jena 1934)
Horní Prysk ⓘ Šenovský Hill	L.Hrůzek
ⓘ Svojkov	O.Janeček (2011)
Svor ⓘ Unnamed hill (altitude 455 m)	P.Pauliš et al. (Czech rep.)
Ústí nad Labem Region Děčín District ⓘ Česká Kamenice	Libor Hruzek
ⓘ Hackenberg	Levyn a další zeolity z Hackenbergu u ...
Líska ⓘ Lipnický Hill	L.Hrůzek-Personal reference
ⓘ Zlatý vrch quarry	Janeček O.
ⓘ Schenkenberg	L.Hrůzek
ⓘ Zámecký hill	Collected by Libor Hrucek
Kunratice ⓘ Kunratice-Eschlers Bergl	L.Hrůzek +1 other reference
ⓘ Kunratice-Malá hůrka (Kröhberg)	O.Janeček
ⓘ Kunratice-Rollberg	O.Janeček +1 other reference
Kytlice ⓘ Mlýny	L.Hrůzek-Personal reference
Malá Veleň ⓘ Jedlka	Pauliš et al. (2021)
Těchlovice ⓘ Milířsko	Bulletin Mineralogie Petrologie vol.26
Litoměřice District ⓘ Prackovice nad Labem	M.Radoň-Významné mineralogické lokality Českého středohoří (čas.Minerál 2/2009)
ⓘ Dobkovičky-Kubačka (hill)	M.Radoň-Významné mineralogické lokality Českého středohoří (čas.Minerál 2/2009)
Louny District Vroutek ⓘ Vrbička (Kleinfürwitz)	Offretite from quarry Vrbička near Doupov in Doupovské hory Mts. (Czech Republic)
Finland
South Ostrobothnia Lappajärvi ⓘ Lappajärvi meteorite crater	Lehtinen
France
Auvergne-Rhône-Alpes Ardèche Largentière Borée ⓘ La Borne Farm (Goudet)	P & E Médard collection
Saint-Jean-le-Centenier ⓘ Mailhac quarry	E. Passaglia et al.
Cantal Saint-Flour Laveissière La Grange de Ganilh ⓘ N122 road cut	P & E Médard collection
Haute-Loire Yssingeaux Araules ⓘ Le Collet	Pongiluppi D. (1976)
Mazet-Saint-Voy ⓘ Le Volamont	Medard E (2010) +1 other reference
Loire Montbrison Châtelneuf ⓘ Mont Semiol (TL)	C.R.Acad.Sci.Paris (1890) +1 other reference
French Southern and Antarctic Lands Kerguelen Islands ⓘ Grande Terre island	Giret et al. (1992)
Occitanie Aveyron Millau Mostuéjouls ⓘ Deglazines	Boisson et al. (2014)
Rodez Argences en Aubrac Sainte-Geneviève-sur-Argence Le Bousquet d'Orlaguet ⓘ RD 537 road works	JR & C Eytier collection
Germany
Baden-Württemberg Freiburg Region Emmendingen Sasbach am Kaiserstuhl ⓘ Eichert	Bega photo
ⓘ Limberg Quarries	WEISENBERGER et al. (2009)
Tuttlingen Immendingen ⓘ Höwenegg Quarry (Hewenegg Quarry)	in the collection of Christof Schäfer
Bavaria Lower Franconia Haßberge District Maroldsweisach ⓘ Zeilberg Quarry	Wittern (2001)
Upper Palatinate Tirschenreuth District Kemnath Atzmannsberg ⓘ Kuschberg	www.vfmg-weiden.de (2001)
Weha ⓘ Lerchenbühl	Keck (2010)
Kulmain ⓘ Aign quarries	Wolfgang Bäumler collection
Pechbrunn ⓘ Großer Teichelberg (Teichelberg; Teichlberg)	Weiß (1990)
Wiesau Triebendorf ⓘ Basalt works	Pöllmann et al. (1990)
Hesse Darmstadt Darmstadt-Dieburg Roßdorf ⓘ Roßberg Quarry	PETITJEAN collection
Wetteraukreis Gedern ⓘ Bonacker quarry
Nidda Ober-Widdersheim ⓘ Ober-Widdersheim quarry
ⓘ Rübenkeller	Betz (2019)
Ortenberg ⓘ Gaulsberg quarry
Giessen Region Giessen Buseck Großen-Buseck ⓘ Attenberg quarry	Weiß (1990)
Fernwald Annerod ⓘ Platte	Weiß (1990)
Hungen Langd ⓘ Maykranz Quarry
Laubach Gonterskirchen ⓘ Basalt quarry ?	Weiß (1990)
Lahn-Dill-Kreis Greifenstein Allendorf ⓘ Alter Stein Quarry	SEM-EDS by Joy Desor
Vogelsbergkreis Herbstein ⓘ Herbstein basalt quarry (Schrimpf basalt quarry)
Schotten ⓘ Nidda Dam	Zeolite collection of Volker Betz
ⓘ Rainrod	Zeolite collection of Volker Betz
North Rhine-Westphalia Arnsberg Siegen-Wittgenstein Neunkirchen Salchendorf ⓘ Basanite quarry ?	Klein (1999)
Rhineland-Palatinate Mayen-Koblenz Vordereifel Ettringen ⓘ Caspar quarry	Blass et al. (2006)
Neuwied Linz am Rhein Linz am Rhein ⓘ Meerberg	Passaglia et al. (2001)
Vulkaneifel Gerolstein Walsdorf Zilsdorf ⓘ Arensberg	Hentschel
Westerwaldkreis Wallmerod Hundsangen ⓘ Ölberg quarry	Zeolite collection of Volker Betz
Meudt ⓘ Stemmer clay pit	Eberhard Klein (2016)
Hungary
Nógrád County Somoskő ⓘ Bagó-kő	Szakáll: 100 Hungarian Mineral Locality
Veszprém County Sümeg District Bazsi Prága Hill ⓘ Karikás Hill quarry (Kalapos Hill)	Mineral Species of Hungary +1 other reference
Italy
Lombardy Brescia Province Cevo ⓘ Lake Arno offretite locality	Guastoni et al. (2002)
Upper Val Saviore Mt. Foppa ⓘ Forcel Rosso Gully (Forcel Rosso Pass)	E. Passaglia and A. Tagliavini : ... +1 other reference
Tuscany Livorno Province ⓘ Upper Ugione stream valley ?	Sammartino (2014)
Veneto ⓘ Alpone Valley	Mattioli et al. (2016)
Verona Province Marano di Valpolicella ⓘ Santa Cristina	doi:10.3390/min8020069 +1 other reference
Negrar di Valpolicella ⓘ Prun	doi:10.3390/min8020069 +1 other reference
Roncà ⓘ Monte Calvarina	doi:10.3390/min8020069 +1 other reference
San Giovanni Ilarione ⓘ Basalt quarry (San Giovanni Ilarione quarry)	doi:10.3390/min8020069 +1 other reference
ⓘ Beltrami	doi:10.3390/min8020069 +1 other reference
ⓘ Cattignano quarry	doi:10.3390/min8020069 +3 other references
ⓘ Chiereghini Valley	doi:10.3390/min8020069 +1 other reference
ⓘ Roccolo Pass tuff outcrop (Monte Calvarina west slope)	Daleffe et al. (2005) +1 other reference
ⓘ Soave	doi:10.3390/min8020069 +3 other references
ⓘ Colombara (Ca' Visco)	doi:10.3390/min8020069 +1 other reference
ⓘ Fittà	doi:10.3390/min8020069 +7 other references
ⓘ Monte Foscarino south slope	doi:10.3390/min8020069 +2 other references
Vicenza Province Altissimo and Valdagno Cerealto Monte Furlon Contrada Re ⓘ Bentonite mine	Boscardin M. et al. (1998) +2 other references
Chiampo Roccolo Pass ⓘ Monte Madarosa Quarry	Daleffe et al. (2005) +2 other references
Montorso Vicentino Contrada Nori ⓘ Monte Scagno	Boscardin et al. (1998) +2 other references
San Pietro Mussolino ⓘ Bertocchi quarry (ex Alvese quarry)	Studi e Ricerche - Associazione Amici del Museo - Museo Civico "G.Zannato" Montecchio Maggiore (VI)
Valdagno Cerealto ⓘ Contrada Re	Boscardin et al. (1998)
New Zealand
Auckland Region ⓘ Waitakere Ranges	NZ Zeolite list and locations. Neville ...
ⓘ Opanuku Stream	Collection of RJ Martin
ⓘ Waitakere River	Rod Martin personal collection
Marlborough Region ⓘ Middlehurst Station	J. Thornton. Zeolites and other minerals on Middlehurst Station. Essence of Microscope (NZ)
ⓘ Upcot Station	Essence of Micro-Scope
Northland Region Kaipara District Aranga ⓘ Aranga Quarry (Stone's Quarry; Hood Road Quarry)	Collection of RJ Martin inferred from ...
Donnellys Crossing ⓘ Waima River	NZ Zeolite list and locations. Neville ...
Hukatere Peninsula ⓘ Hukatere Volcano	T. Saunderson collection
Poland
Lower Silesian Voivodeship ⓘ Jawor County	Krzysztof Andrzejewski Collection
Gmina Męcinka Męcinka ⓘ Męcinka basalt quarry	Krzysztof Andrzejewski Collection
Saudi Arabia
Medina Region ⓘ Al-Monawarh	Faheha et al. (2012)
Spain
Canary Islands Las Palmas Province Fuerteventura Pájara ⓘ Morro de Jable	Tschernich (1992)
Gran Canaria Mogán ⓘ Degollada de Veneguera	in the collection of Christof Schäfer
Lanzarote Haría ⓘ Famara cliff	Zeolite collection of Volker Betz
Yaiza Playa Blanca ⓘ Punta del Aguila	Tschernich (1992)
Santa Cruz de Tenerife Province Tenerife ⓘ Alcala	Dill et al. (2023)
UK
Northern Ireland Co. Antrim ⓘ Ballyclare	Nawaz (1978) +1 other reference
Scotland Highland Eilean á Chèo Isle of Skye Duirinish Dunvegan ⓘ Oisgill Bay
Trotternish Staffin Flodigarry ⓘ Flodigarry Quarry	Day (1999)
ⓘ Quiraing	Livingstone et al. (1983) +1 other reference
North Ayrshire Beith ⓘ Loanhead Quarry	[BMS]
Renfrewshire ⓘ Hartfield Moss	Day (1999)
Ukraine
Crimea ⓘ Karadag Reserve (Kara-Dag)	Tischenko A. data
USA
Arizona Greenlee County Clifton San Francisco River area ⓘ Unspecified roadcut	Anthony et al. (1995)
Maricopa County ⓘ Horseshoe Dam area (Horseshoe Dam Clinoptilolite occurrence)	AM61_853
Pinal County Dudleyville Malpais Hill ⓘ Middle railway cut	Bideaux et al. (1960) +2 other references
ⓘ North railway cut	Tschernich (1992)
ⓘ South railway cut	Bideaux et al. (1960) +2 other references
Yavapai County ⓘ Santa Maria River	Anthony et al. (1995)
California Del Norte County Coastal Range Crescent City area Elk Creek ⓘ Unnamed Zeolite occurrence [1]	Tschernich (1992)
Los Angeles County Agoura Hills ⓘ Canwood Street site	Fred DeVito collection
ⓘ Kanan Road (Ferrierite locality) ?	Fred DeVito specimen
ⓘ Santa Monica Mountains	Mineral News v.14 no.9
Colorado Jefferson County Golden Mining District Golden ⓘ North Table Mountain	Rocks & Minerals 79:4
ⓘ South Table Mountain	Wilson (1988)
Idaho Ada County ⓘ Lucky Peak Dam	Tschernich (1992)
Adams County ⓘ Pinehurst	Ream (2004)
Idaho County ⓘ Little Salmon River
Skookumchuck Creek ⓘ US highway 95 roadcut (219)	Ream (2004)
Nevada Clark County Spring Mountains Goodsprings Mining District ⓘ Rosella claim	Robert Housley pers.comm.
ⓘ Pershing County	Castor et al. (2004)
New Jersey Hudson County Secaucus ⓘ Laurel Hill	Minerals of Laurel Hill et al. (published privately)
New Mexico Grant County ⓘ Alum Mountain Mining District (Alum Mining District)	Northrop et al. (1996)
ⓘ Big Lue Mountains	Northrop et al. (1996)
ⓘ Coal Creek	Gibbs (1992)
ⓘ Black Canyon	Northrop et al. (1996)
Oregon Clackamas County ⓘ Milwaukie	Micro Probe Vol. 6 No. 4 +1 other reference
ⓘ Elk Rock Island	Micro Probe Volume VI Number 4
ⓘ SE Lava Drive	Rudy Tschernich Zeolite Collection
Columbia County Goble ⓘ Neer Road	Micro Probe Vol. 6 No. 5 Fall 1987 +1 other reference
Grant County Mount Vernon ⓘ Beech Creek Quarry	Micro Probe Volume VI Number 4
North Fork John Day River ⓘ Devils Backbone	Rudy Tschernich Zeolite Collection
Ritter ⓘ Middle Fork Cliffs	Rudy Tschernich Zeolite Collection
ⓘ Roadside Quarry	Micro Probe Volume VII Number 8 Fall ...
ⓘ Upper Ritter Quarry	Micro Probe Volume VII Number 8 Fall ...
Lake County ⓘ Adel	Micro Probe Vol. 7 No. 9 Spring 1994 +2 other references
Lakeview ⓘ Drews Reservoir	Micro Probe Volume VI Number 4
Malheur County Lake Owyhee State Park ⓘ Owyhee Dam	Tschernich (1992)
Wheeler County Spray ⓘ Burnt Cabin Creek	Micro Probe Vol. 6 No. 4 +1 other reference
Washington Cowlitz County ⓘ Signal Peak	Micro Probe Vol.7 No.9 Spring '94
Toutle Elk Mountain ⓘ Road 1440	Rudy Tschernich Zeolite Collection
Signal Peak ⓘ Road 4680	Rudy Tschernich Zeolite Collection
Wolf Point ⓘ 200 / 237 Road Quarry	Micro Probe Vol. 7 No. 10
Douglas County ⓘ Rock Island Dam	Cannon (1975) +1 other reference
Grays Harbor County Porter ⓘ Five Mile Quarry (Upper Lytle Quarry)	Rudy Tschernich Zeolite Collection
ⓘ Four Mile Quarry	Micro Probe Vol. 7 No. 5 Spring '92
Thurston County Black Hills ⓘ Rock Candy Mountain	Tschernich (1992)