Punta del Aguila, Playa Blanca, Yaiza, Lanzarote, Las Palmas Province, Canary Islands, Spain
Field of view 12 mm. Specimen size 5 cm. Mesolite with epitaxial overgrowth of Natrolite carrying small dots of Todorokite on a crust of Chabazite-Na. Small blades of Thomsonite-Ca are also present. Zeolite collection of Volker Betz.
© Volker Betz (2010)
Barranco del Cuervo, El Risco, Agaete, Gran Canaria, Las Palmas Province, Canary Islands, Spain
Almost perfect, translucent, 12 mm analcime crystal with small (100) face on basaltic rock matrix.
© Volker Betz (2022)
Lath like, translucent crystals of todorokite on blades of thomsonite-Ca. the star l ike aggregate indicates twinning.
© (2026) Volker Betz
Port road outcrop, Morro de Jable, Pájara, Fuerteventura, Las Palmas Province, Canary Islands, Spain
Amygdaloidal basalt . In the cavities we can find calcite, quartz and numerous zeolites.
El Hierro, Santa Cruz de Tenerife Province, Canary Islands, Spain
Pahoehoe basaltic ropy lava fan near La Restinga
© 2019 Josele
Red-brown lathlike crystals of todorokite on chabazite.
© Volker Betz (2008)
Field of view ca. 9 mm. Collected ca. 1986 at beach-cave E of Castillo. Mesolite with epitaxial Natrolite overgrowth. Thomsonite is (not visible) in the center of the spray. Black spots are Todorokite. Zeolite collection of Volker Betz.
Rare, well shaped gobbinsite interpenetration twin visible on a sphere of an fibrous gobbinsite/phillipsite-Na epitaxy. Phillipsite-Na is the minor constituent of this epitaxy. Most of this spheres show a phillipsite surface.
© Volker Betz (2019)
Detail of a vug in basaltic matrix with tabular levyne crystals and dark sprays of todorokite with a red-brown hue.
© Volker Betz (2025)
Very lustrous blades of todorokite on coated phacolite crystals in a vug of basaltic matrix.
Field of view ca. 8 mm. Zeolite collection of Volker Betz.
Sanidinite occurrence, Tenerife, Santa Cruz de Tenerife Province, Canary Islands, Spain
Loparite-(Ce) cubes twinned according to Spinel law; associated minerals are Sanidine, Aegirine. Photo: Marko Burkhardt
© Christof Schäfer
Famara cliff, Haría, Lanzarote, Las Palmas Province, Canary Islands, Spain
Transparent crystal of faujasite on offretite in a vug of an olivine rich basaltic matrix. Collected by Gerhard Braun from the beach gravel at famara. Faujasite / offretite is a typical zeolite paragenesis in alcaline rocks.
© Volker Betz (2021)
Mount Teide, La Orotava, Tenerife, Santa Cruz de Tenerife Province, Canary Islands, Spain
A sharp, euhedral, complete, brownish-green augite crystal. 4.4 x 3.0 x 2.3 cm
© Rob Lavinsky & irocks.com
Field of view ca. 3 mm. A fan of Thomsonite on Chabazite from a often submerged place (Zone 2)where the Chabazite, possibly first growing as Chabazite-Ca, was subject of ion exchange to Chabazite-Na. Zeolite collection of Volker Betz.
Montaña Aserrada, Anden Verde, La Aldea de San Nicolás, Gran Canaria, Las Palmas Province, Canary Islands, Spain
Calcedony on basaltic rock matrix.
© Volker Betz (2018)
A rare interpenetration twin of gobbisite with some brown coating, íntergrown with minor phillipsite-Na on the surface of a gobbinsite hemisphere of 12 mm.
Montana del Carrizo, La Aldea de San Nicolás, Gran Canaria, Las Palmas Province, Canary Islands, Spain
Tabular lévyne crystals in a vug of basaltic matrix. The same specimen shows also vugs with analcime.
Montaña Ayosa, Arafo, Tenerife, Santa Cruz de Tenerife Province, Canary Islands, Spain
Augite crystal from Montaña Ayosa, Tenerife, collected by Ricardo Pimentel in July 2002. Rui Nunes' specimen and photo, 2006.
© Rui Nunes 2006
Vug with hemispheres of thomsonite over chabazite. Collected 1985 ca. 300 m N of Castillo from road workings. Zeolite collection of Volker Betz.
© Volker Betz (2023)
Field of view is 4 cm. Zeolite collection of Volker Betz.
Manganoeudialyte (pink) in association with aegirine (dark greenish) and albite (white). Photo Bernd Gassmann.
Fuente del Viento, Risco Faneque, Agaete, Gran Canaria, Las Palmas Province, Canary Islands, Spain
Crystal of 11 mm. Zeolite collection of Volker Betz.
© Volker Betz (2009)
Field of view ca. 19 mm. Balls of tabular Thomsonite crystals. Zeolite Collection of Volker Betz.
Semitransparent Levyne with very thin epitaxial erionite coating. Collected ca. 1985 from cliff SW of Castillo de las Coloradas. This is the other half cavity from http://www.mindat.org/photo-156478.html . Zeolite collection of Volker Betz.
photo Gerhard Niceus
Field of View ca. 7 mm. Zeolite Collection of Volker Betz.
Tinguatòn, Tinajo, Lanzarote, Las Palmas Province, Canary Islands, Spain
Forsterite partially replaced by dark red iddingsite. Green unreplaced forsterite is present as is green diopside and a few black grains of spinel.
© Van King
Perimorphose of a chlorite group mineral (most likely Clinochlore) after aragonite. The aggregates are inside empty, visible at upper left. Some chabazite-Na is in the background. Aragonite itself has not been found at the location but is a typical mineral for zeolite assemblages.
© Volker Betz (2014)
White acicular Rinkite-(Ce) crystals associated with Aegirine and Feldspar, photo Marko Burkhardt
Hoya del Almácigo, Veneguera, Mogán, Gran Canaria, Las Palmas Province, Canary Islands, Spain
View in direction of c-axis into a so called cup quartz. The crystal is isolated from a group of crystals. The crystal is inside empty and the bottom broken off. Video made with Helicon Focus.
Sculptural aggregate of chalcedony. Collected from the rock surface.
Cluster of hollow quartz crystals.
© Volker Betz (2024)
Barranco de Carrizo, La Aldea de San Nicolás, Gran Canaria, Las Palmas Province, Canary Islands, Spain
Group of epitaxial composite crystals with chabazite-Ca core and incomplete coverage of gmelinite-K. Small crystals of analcime cover the wall of the vug. Collection and photo of Gianfranco Ciccolini. Nikon D850, bellows, Scheider Kreuznach Componon 80 mm; f: 5.6. Focal using 7
Camino de la Playa del Asno, Tasartico, La Aldea de San Nicolás, Gran Canaria, Las Palmas Province, Canary Islands, Spain
Group of two lens-like phacolite crystals.
Chabazite in the phacolite form as a rare almost complete crystal.
Hollow qartz crystals. The tip and the center of the crystals is missing.
Aggregate of calcedony. This sample indicated that this aggregates grow in steps. First a more light stage which has a medio intensive fluorescense in SW UV-light, then more yellow caps with no fluorescense, due to sqenching from Fe-Minerals.
Vug in basaltic matrix lined with analcime crystals, partally covered with yellow-orange pigmented clay minerals. The analcime shows interesting growth figures and some cube faces.
Playa de Hermigua, Hermigua, La Gomera, Santa Cruz de Tenerife Province, Canary Islands, Spain
Clusters of tabular thomsonite crystals with acicular mesolite.
This is from the first sample I colleted in 1983 and it remained unidentified for several years. Found just SW of Castillo at low tide in beach gravel.
Vesicular basaltic rock matrix with a vug lined with small blades of cowlesite and a few tabular lévyne crystals very thin coated with erionite.
Field of view ca. 5 mm. Clear Analcime crystals on clay minerals, which are white inside the crystals. Associated with Chabazite. Zeolite Collection of Volker Betz.
Analcime crystal with (100) face in a vug of basaltic matrix.
Specimen is 5.5 cm. Zeolite collection of Volker Betz.
Montaña de Arucas, Arucas, Gran Canaria, Las Palmas Province, Canary Islands, Spain
Haüyne in Tahitite, field of view 40 mm, collection Ch.&H. Schäfer
Analcime with coated (211) and uncoated (100) forming a window in which the underlaying clay minerals are visible.
© Volker Betz (2006)
Tenerife, Santa Cruz de Tenerife Province, Canary Islands, Spain
Floater twinned crystal.
© Carles Curto Milà 2010
Barranco de Tocodoman, La Aldea de San Nicolás, Gran Canaria, Las Palmas Province, Canary Islands, Spain
Transparent orange crystals of clinoptilotite-Ca on a crust of calcite and clay minerals.
© Volker Betz (2015)
Santa Cruz de Tenerife Province, Canary Islands, Spain
Large crystal in small geode Diameter 3,9 mm Specimen and photo by Enrico Bonacina
© Enrico Bonacina
Sculptural aggregate of chalcedony as picked from the rock (only cleaned).
Detail of a cluster of quartz crystals, partly formed as hollow quartz over a small part of chalcedony.
Unusual large hollow quartz crystals with a growing diameter along the c-axis.
Single iridescent Magnetite crystal with colorless Phillipsite-Group crystals on matrix
Mogán, Gran Canaria, Las Palmas Province, Canary Islands, Spain
Moganite with Chalcedony from Barranco de Los Medios Almudes. Analyzed Sample (Ian T. Graham, Australian Museum, pers. comm.). Size is 5.5x4 cm. Collected 2003.
Barranco Taurito, Playa de Mogán, Mogán, Gran Canaria, Las Palmas Province, Canary Islands, Spain
45x30 mm. A mixture of Moganite and Chalcedone occuring as fissure filling in the Ignimbrites.
Las Cañadas Del Teide, La Orotava, Tenerife, Santa Cruz de Tenerife Province, Canary Islands, Spain
Specimen 5x3x2 cm February 2011
© Photo & Collection of Martins da Pedra
Lanzarote, Las Palmas Province, Canary Islands, Spain
Olivine nodule in basaltic lava - Size around 13 x 10 cm - Ex. Geol. V. Buchignani - Feb. 1984
© Dott. Geol. Marco Barsanti - geoman1@tin.it
Field of view ca. 7 mm. This is from the first sample I colleted in 1983 and it remained unidentified for several years. Found just SW of Castillo at low tide in beach gravel. Zeolite collection of Volker Betz.
Road FV-605 Roadcut, La Pared, Pájara, Fuerteventura, Las Palmas Province, Canary Islands, Spain
Collected 1996.
Spray of mesolite with small white calcite crystals. This sprays are from a cliff cave with water submerge and have typical an epitaxial overgrowth with natrolite.
Playa de Candelaria, Candelaria, Tenerife, Santa Cruz de Tenerife Province, Canary Islands, Spain
Olivine with some alteration. (The label said Iddingsite.) FOV 10x8 mm. February 2011
Lath like, lustrous, dark, very thin crystals of todorokite with a reddish tint and black spheres in a vug of basaltic matrix.
Playa Blanca, Yaiza, Lanzarote, Las Palmas Province, Canary Islands, Spain
Analcime. Field of view is 0,2 cm. Specimen and photo: Stefan Schorn
© Stefan Schorn, Mineralienatlas
Nepheline outcrop, Taganana, Santa Cruz de Tenerife, Tenerife, Santa Cruz de Tenerife Province, Canary Islands, Spain
Olivine, 4.5 x 2.5 x 2.5cm. December 2004
Field of view is 8 cm. Zeolite colletion of Volker Betz.
Field of view ca. 4.5 cm. Part of a large phillipsite sphere with small levyne and calcite crystals.Collected 1985 at the cliff W of Castillo de las Coloradas. This profilic location is now just W of the promenade and mostly covered with it. Zeolite collection of Volker Betz. Update in 2019: Result of further inverstigations came to the result ...
Field of view ca. 15 mm. Zeolite colletion of Volker Betz.
Collected ca. 1985 from the cliff W of Castillo de las Coloradas. Unusual large hemisphere of Gobbinsite with eptaxial phillisite surface and some dark todorokite. The surface is formend by the (110) faces of phillipsite. The core of such hemispheres is a fibrous epitaxy of gobbinsite/phillipsite.
Collected in sept. 1985 ca. 300 m N of the Castillo de las Coloradas. This area is now covered by a hotel complex.
Field of view ca. 9 mm. Collected about 1985 at Playa de Las Colorades from boulders at low tide. Zeolite collection of Volker Betz.
Field of view ca. 14 mm. Inside hollow perimorphs of clay-minerals after Aragonite. Collected ca. 1986 at cliff SW of the Castillia de las Colorados. Zeolite collection of Volker Betz.
Benchijigua, San Sebastián de la Gomera, La Gomera, Santa Cruz de Tenerife Province, Canary Islands, Spain
Field of view ca. 25 mm. Specimen 3x4 cm.
Field of view ca. 12 mm. For the location exceptional large , complex twin. Zeolite collection of Volker Betz.
From Barranco de Tocodoman, cruce de Tasartico, La Aldea de San Nicolás de Tolentino. Collected by Jose Bello Quintela and Pepe Ruano.
© Juan de Laureano Rios
