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RM2594   Orthoclase

Plutón de La Cabrera, Valdemanco, Madrid, Spain

Very good size specimen, formed by numerous very well defined orthoclase crystals. It was in this classic locality in the community of Madrid where, around the 70s, the Daunis-Ruscalleda family, well-known mineral prospectors and collectors from Barcelona, found quite a few very aesthetic specimens of orthoclase/microcline, accompanied by Enrique Kucera. This specimen is one of these ...


Size: 14 x 12 x 8.5 cm.
Main crystal: 2.3 cm.
Found in 1970's.

Col. L. Daunis (Barcelona).
Classic locality
Price: 160 €Buy
 

RM2545   Orthoclase, Karlsbad twin

La Machota Baja, Zarzalejo, Madrid, Spain

Karlsbad twinned orthoclase, from this classic Spanish locality for the species and twin. It belongs to the collection of Joan Astor, with a handwritten label.


Size: 3.4 x 2.5 x 1.4 cm.
Found in ±1973.

Col. J. Astor, Barcelona.
Classic locality


 

RM2544   Orthoclase, Karlsbad twin

La Machota Baja, Zarzalejo, Madrid, Spain

A huge size orthoclase crystal, showing defined prism and pinacoidal faces, with the karlsbad twin. We think it is glued on its place on the matrix, but it is not visible. Crystal is on this porphyry granite-adamellite, part of the potent dykes with large phenocrysts of potassium feldspar (orthoclase) of great perfection. A classic Spanish locality for the species.


Size: 5.5 x 4.8 x 3.5 cm.
Main crystal: 3.4 x 1.9 cm.
Found in ±1975.

Col. J. Astor, Barcelona.
Classic locality


 

RM2246   Orthoclase, double twinned

La Machota Baja, Zarzalejo, Madrid, Spain

A very aesthetic miniature. Orthoclase specimen that shows two crystals with the Karlsbad twin. An unusual piece for this classic Spanish locality. From the Joan Astor collection (Barcelona), former Joan Abella collection (Sabadell).


Size: 3 x 2 x 2 cm.
Found in 1990's.

Col. Joan Astor, Col. Joan Abella.
Classic locality


 

RM1934   Staurolite

Montejo de la Sierra, Madrid, Spain

Large crystals of staurolite included in micaceous schist from this classic Spanish area. The formation of metamorphic materials of the Oriental Guadarrama range, with a medium grade regional metamorphism, includes banded shales with almandine, sillimanite, distena and andalusite.


Size: 12.5 x 5.5 x 3.5 cm.
Main crystal: 32 x 12 mm.
Found in ±1982.

 

RM1808   Perovskite with magnetite

Buitrago de Lozoya, Madrid, Spain

Perovskite is an very unusual species, if we add that crystals are in good condition, damage free, and that they were collected in a locality of close to Madrid, the species becomes even more interesting... In this piece highlights a group of perovskite crystals between toasted honey to yellowish tones, cube-shaped, translucent and brilliant. One of them with a good size for the locality. They are accompanied by aggregates of octahedral magnetite crystals. A rarity. Specimen has been repaired consolidating a fissure of the matrix, not afecting crystals.


Size: 6.9 x 3.8 x 2.4 cm.
Main crystal: 3 x 2 mm.

Col. Jordi Povill (Olesa de M., Barcelona) No. 3673. - Repaired


 

RM1622   Orthoclase

La Machota Baja, Zarzalejo, Madrid, Spain

A huge size orthoclase crystal, showing defined prism and pinacoidal faces. It present a small repared edge made many years ago by the owner Sr. L. Daunis, a very perfect work. Crystal is embeded in this porphyry granite-adamellite, part of the potent dykes with large phenocrysts of potassium feldspar (orthoclase) of great perfection. A classic Spanish locality for the species.


Size: 10.5 x 9.2 x 7.5 cm.
Main crystal: 4.7 x 2.8 cm.

Excol. Lluís Daunis & Maria Ruscalleda.


 

RM1453   Sepiolite

Almodóvar Hill, Vicálvaro, Madrid, Spain

This specimen of sepiolite comes from what is considered the most important deposit of this mineral in the world.


Size: 5.5 x 4.5 x 3.0 cm.

Ex-col. Gustav Beck
 
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