FMF - Friends of Minerals Forum, discussion and message board

[Firmo Espinar]

Quartz from Buriticá, Antioquia Department, Colombia. (Nº-70).

Doubly terminated crystal, untouched after digging.

[Firmo Espinar]

Hematite from Agadir, Morocco.

[Firmo Espinar]

Quartz from Muzo, Boyacá Department, Colombia. (Nº-17).

Druse of transparent quartz needles.

[Firmo Espinar]

Calcite from Cantabria, Spain.

Coffee colored Calcite in matrix.

---------
Andalusite (variety chiastolite) from Australia.

[Firmo Espinar]

Vanadinite from Mibladen, Morocco.

Cluster with a prominent crystals and colored on the base. Coming from a new geode discovered at 600 m depth.

[Firmo Espinar]

Three from Andalusia, Spain.

Siderite from Sierra Nevada, Granada, Spain.

Quartz from Sierra Nevada, Granada, Spain.

Quartz (variety amethyst) from Córdoba, Spain.

[Firmo Espinar]

Sphalerite from Áliva, Cantabria, Spain.

Honey colored Sphalerite. Two pictures, the last taken under backlight.

[Firmo Espinar]

Baryte with Malachite from Torrelavega, Cantabria, Spain.

[Firmo Espinar]

Calcite from Cantabria.

----------
Hematite from Agadir, Morocco.

[Firmo Espinar]

Quartz (variety chalcedony) from Smara, Es-Semara Province, Laâyoune-Sakia El Hamra, Morocco.

Spherical shapes in this chacedony.

[Firmo Espinar]

Quartz, Pyrite, Calcite from Panasqueira, Portugal.

A couple of crystals covered by blue and golden Pyrite and sharp Calcite.

[Firmo Espinar]

Calcite from Candesa Quarry, Cantabria, Spain.

[Firmo Espinar]

Quartz with Aurichalcite from Cantabria, Spain.

[Firmo Espinar]

Arsenopyrite and Siderite from Panasqueira, Portugal.

[Firmo Espinar]

Goethite from Tharsis, Huelva, Spain.

Iridiscent Goethite.

[Firmo Espinar]

Quartz from Minas Gerais, Brazil.

Translucent Quartz with many faces.

Due the light hidden lines appear in three termination faces, that divide all of them. The main face is a triangle and the others are a pentagon and a trapezoid.
These lines are not noticed by touch.

[Sante Celiberti]

Nice light effect on the pseudo pyramid faces.

I've counted on your triangle 4 edges: the fourth belongs to an extra S face. Congratulations for this bonus.

[Firmo Espinar]

Hi Sante.

Thank you very much for your message.

You’re right about that. I´d described the first triangle with four edges.


Now a Calcite from Cantabria, Spain.

[Firmo Espinar]

Quartz from San Roque, Northeastern, Antioquia Department, Colombia. (Nº-72).

Slim doubly terminated crystal with internal white drawings.

---------
Quartz from Mexico.

[Firmo Espinar]

Kyanite from Minas Gerais, Brazil.

Three divergent flattened sprays of black Kyanite.