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RM1475   Danburite with chalcopyrite and bornite

San Bartolo Mine, Charcas, Mun. de Charcas, San Luis Potosí, Mexico

A huge size danburite specimen totally different from what we can usually find from this Mexican locality. Formed by a large group of prismatic crystals, which have different faces of the orthorhombic prism, with very defined terminal faces. Good transparency in most crystals, others are translucent. They are disposed on a matrix of good size chalcopyrite crystals, some of them partially covered by iridescent bornite. A museum piece.


Size: 10.0 x 9.0 x 4.0 cm.
Main crystal: 35 x 8 mm

 

RM1994   Danburite with Pyrite and Sphalerite

Aurora Mine, Charcas, Mun. de Charcas, San Luis Potosí, Mexico

Rich group of danburite crystals, transparent to translucent, with developed prism and defined faces and edges. Some with nicks in the terminal parts, but without affecting the whole. They are disposed on a matrix with pyrite and sphalerite crystals. Brightness, snowy white, very aesthetic and ancient specimen.


Size: 6 x 4.8 x 3.7 cm.
Main crystal: 1.5 cm.
Found in 1988.

Col. Manchion #375, 1988, Kucera.
Price: 70 €Buy
 

RM710   Topaz with rutile inclusions

El Tepetate, Villa de Arriaga, San Luis Potosí, Mexico

A nice cluster of topaz crystals with very well defined faces and edges, with a developed prism, cuted by the basal pinacoid and other order prism faces on top. The tile color is very intense in some of them and with color zoning in others, more intense in pinacoidal faces. From transparent to translucent, with good brilliance. Rutile inclusions can be observed as thin reddish needles inside the prism. They are very aerial disposed on a rhyolite matrix. Nice miniature. It is very interesting the origin of the word tepetate (tepetatl).


Size: 2,5 x 2,5 x 1,8 cm.
Main crystal: 10 x 3 mm.

 

RM711   Topaz with opal-AN and rutile inclusions

El Tepetate, Villa de Arriaga, San Luis Potosí, Mexico

A nice cluster of topaz crystals with very well defined faces and edges, with a developed prism, cuted by the basal pinacoid and other order prism faces on top. The tile color presents zoning, more intense in pinacoidal faces. From transparent to translucent, with good brilliance. With an aesthetic opal-AN aggregate on one of the main crystals. Opal presents intense green fluorescence under SW-UV light. Rutile inclusions can be observed as thin needles in the topaz prisms and in the opal. One of the topaz crystals presents a minor damage. They are very aerial disposed on a rhyolite matrix. Nice miniature. It is very interesting the origin of the word tepetate (tepetatl).


Size: 2,5 x 2,5 x 2,5 cm.
Main crystal: 11 x 7 mm.

Fluorescent under LW-UV and SW-UV lights
 
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