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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


 

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
 

RM1899   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: 6.5 x 5 x 3.5 cm.
Main crystal: 42 x 12 mm.
Found in ±1982.

Price: 45 €Buy
 

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.

 

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.


 
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