La Gomera, Santa Cruz de Tenerife Province, Canary Islands, Spain

Clusters of tabular thomsonite crystals with acicular mesolite.

© Volker Betz (2025)

Field of view ca. 25 mm. Specimen 3x4 cm.

© Volker Betz (2008)

Group of two crystals finished with 5x3,5x3,5cm - June of 2001

© Photo & Collection of Martins da Pedra

Field of view about 3 mm. Zeolite collection of Volker Betz.

© Volker Betz (2017)

Field of view 18 mm. Nice transparent crystals on micro crystals of analcime. The smaller apophyllite crystal shows growth hillocks on (001). Zeolite collection of Volker Betz.

© Volker Betz (2010)

Field of view 5 mm. Fan shaped groups of tabular crystals. Zeolite collection of Volker Betz.

© Volker Betz (2010)

Small mass of Pyrite included in ultrabasic rock, visible in the outcrops located next to the beach Vallehermoso. September 2012.

18 x30 mm specimen with calcite collected at road side.

© Volker Betz (2009)

Single Augite crystal 20x18 mm from a roadside location on the way to Erque.

© Volker Betz (2012)

photo and collection Joachim Esche

© Joachim Esche 2014

Calcite and Quartz vein with pocket areas in which crystallization is observed as the photo. In this deposit these veins form a parallel series, probably related to network faults present in the area. Outcrop located next to the beach of Vallehermoso September 2012

Cluster of augite crystals in crossed eye stereo-view.

© Volker Betz (2019)

Tabular crystals of thomsonite-Ca on a layer of small analcime crystals. Zeolite Collection of Volker Betz. Collected December 2014.

© Volker Betz (2015)

Quartz Crystal with Calcite crystals, the sample comes from one of the veins present in the outcrops located next to the beach of Vallehermoso -size 5x3x3 cm

Analcime xx ,p.w. 0.98 mm,Coll.& Photo Ko Jansen.

© Ko Jansen

Quartz Crystal with Calcite crystals, the sample comes from one of the veins present in the outcrops located next to the beach of Vallehermoso -size 2x1x1 cm

White sperical aggregates of calcite crystals on porous lava matrix.

© Volker Betz (2015)

Tabular, elongated, transparent, thomsonite-Ca crystals, with small transparent analcime crystals. Collection and photo by Gianfranco Ciccolini. Nikon D850, bellow, Luminar 40 mm, total opening.

© Harald Biecker

Hydrothermal vein with damaged calcite crystals.

© Krzysztof Andrzejewski

white spheres, up to 9 mm on a porous brown lava matrix - this is definitely calcite, as witnessed by a strong effervescence with cold dilute HCl collection Raymond Dedeyne (RCD3009 - 08/2015), ex collection Albert Vercammen (V384) photo and copyright Theo Muller

Augite twin after (100) isolated from a tuff matrix. This is a test video in order to establish a work flow made from 72 stacked pictures, stacked with lens focus stacking with 30 pictures per stack. Rotation was made with a geared stepper motor controlled with a MJKZZ motor controller triggering the camera. The 72 pictures have been ...

© Volker Betz (2020)

Fan shaped spray of tabular thomsonite-Ca, in the center a blocky crystal, on a layer of analcime.

© Volker Betz (2016)

Spray of tabular thomsonite-Ca crystals with analcime from a vug in basaltic matrix.

© Volker Betz (2025)

Blocky chabazite-Ca crystals on matrix Euromex EduBlue, built-in 5 MP USB-2.0 1/2.8 inch Sensor CMOS Camera ImageFocus Plus capturing, Helicon Focus stacking Peter Lof photo and collection

© Peter Lof

Vug in basaltic matrix lined with small analcime crystals and sprays of Thomsonite-Ca. In the center of the sprays aggragates of typical thomsonite-Ca are visible. The long prismatic crystals look rather like mesolite but some are curved which is strange for mesolite. At a more enlargment ( see daughter picture) it is visible that the cross ...

© Volker Betz (2025)

Part of a vug in basaltic matrix with sprays of acicular mesolite covering a thomsonite-Ca core over a layer of small analcime crystals. The mesolite crystals start from the rock wall and penetrate analcime crystals.

© Volker Betz (2025)

Part of a vug in basaltic matrix covered with fine fibers of mesolite with some tabular thomsonite-Ca. The mesolite covers a layer of small analcime crystals, but mesolte is the oldest mineral, penetrating some analcime crystals.

© Volker Betz (2025)

Vug in basaltic matrix lined with small analcime crystals, a spray of tabular thomsonite-Ca and long prismatic mesolite.

© Volker Betz (2015)

Rosettes of tabular thomsonite crystals in a vug of basaltic matrix with analcime.

© Volker Betz (2025)

Vog in basaltic matrix with hemispheres of thomsonite and yellow carbonate crusts.

© Volker Betz (2025)

Yellow calcite with white apophyllite on a layer of very small analcime crystals.

© Volker Betz (2025)

Interpenetration twin of chabazite in a vug of basaltic matrix lined with very small analcime crystals.

© Volker Betz (2025)

Phillipsite twin with (100) faces on a laver of very small analcime.

© Volker Betz (2025)

Small vug in basaltic matrix lined with acucular mesolite and tabular thomsonite-Ca over analcime.

© Volker Betz (2025)

Vug in basaltic matrix lined with tabular thomsonite crystals over small analcime crystals.

© Volker Betz (2025)

Detail of the fibrous thomsonite-Ca crystals showing the rectangular ending about 40 µm wide and about 10 µm thick with flat termination.

© Volker Betz (2025)

Vug in basaltic matrix with hemispheres of thomsonite.

© Volker Betz (2025)

Fan shaped aggregates of tabular thomsonite-Ca on a layer of analcime.

© Volker Betz (2025)

Yellow calcite crystals with white to colorless apophyllite over small analcime crystals.

© Volker Betz (2025)

Aggragate of curly thomsonite on a layer of white apophyllite.

© Volker Betz (2025)

Part of a vug in basaltic matrix lined with aggregates of tabular thomsonite crystals.

© Volker Betz (2025)

Yellow calcite with white apophyllite on a layer of very small analcime crystals.

© Volker Betz (2025)

Intense network of dikes, intruding in ultrabasic rocks in outcrops located on the beach in Vallehermoso Outcrop size, 4 meters wide September 2012.

Close up, size of the boulder approx. 20cm

© Krzysztof Andrzejewski

Dykes outcrops of the western side, in the background visible eastern side of the complex with Vallehermoso beach dividing them.

© Krzysztof Andrzejewski

Visible white minerals in porous parts of basalt tuff just under the pyroclastic sediments.

© Krzysztof Andrzejewski

Photo taken from the bus (through the window) on the main road to the central part of the island.

© Krzysztof Andrzejewski

The beginning of the asphalt road from the western part of Vallehermoso beach to Castillo del Mar, close to the roundabout.

© Krzysztof Andrzejewski

General view of the cliff in October 2022

© Krzysztof Andrzejewski

Tecina hill cliff from the Playa de Santiago beach.

© Krzysztof Andrzejewski

Porous basalt tuff and pyroclastic sediments.

© Krzysztof Andrzejewski