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RM2543   Amazonite, Microcline variety

Pikes Peak, Teller Co., Colorado, United States

Group of prismatic crystals of amazonite, a variety of microcline. With defined faces of prisms and pinacoids. It has this characteristic bluish-green color. Pikes Peak is the "mecca" of the amazonites, one of several mountains formed by the erosion of the Pikes Peak batholith, famous for its myarolytic cavities with smoky quartz, amazonite, topaz, among others. It belongs to the collection of Joan Astor, with a handwritten label and another typewritten.

Size: 5.4 x 4.8 x 3.5 cm.
Main crystal: 3.6 cm.
Found in ±1976.

Col. J. Astor, Barcelona.

Price: 90 €Buy

RM2257   Rhodochrosite with quartz

Animas Mining District, Silverton, San Juan Co., Colorado, United States

Excellent specimen of rhodochrosite from this classic American locality from where not many specimens are available, unless they appear in former collections. This piece entered the Joan Astor collection in 1976 and was acquired from Joan Montal, a well-known old dealer from Vilafranca del Penedés (Barcelona). Several rhombohedral rhodo crystals, very well defined, with a very aesthetic pink color. With a globular aggregate of a second generation of rhodo. It stands out on the matrix of quartz crystals. A unique piece.

Size: 5 x 4 x 3 cm.
Found in 1970's.

Col. Joan Astor.


RM1869   Baryte

Sterling Mine, Leeson Pocket, Stoneham, Weld Co., Colorado, United States

A very aesthetic cluster of prismatic, lustrous and gemmy, ice-blue baryte crystals with minor calcite from the named Leeson Pocket at the famous Stoneham locality of Colorado. The form is excellent and the largest crystals are doubly terminated. This fine piece is from the major 1989 finds and purchased to E. Kucera (Barcelona). Nearly pristine, only one crystal on the periphery is broken. An excellent specimen, uncommon in the market. A really interesting article in Rocks and Minerals available here.

Size: 6 x 3 x 2 cm.
Main crystal: 53 x 12 mm.
Found in ±1989.

Col. J.M. Manchion, Barcelona. #477, 1989 Kucera.
Classic locality


RM1809   Amazonite, Microcline variety

Pikes Peak, Teller Co., Colorado, United States

Rich group of microcline crystals, amazonite variety, showing defined faces and edges and a very aerial disposition. The color is quite good and very attractive. From an old Catalan collection.

Found in ca. 1984

Col. J.M. Manchión (Barcelona). No.81, adq. C. Curto 05/1984.


RM1402   Hübnerite with quartz

Adams Mine, Cement Creek, Eureka, San Juan Co., Colorado, United States

An excellent old classic from the American mineralogy. Really sharp crystals of hübnerite forming groups of parallel growths, some of them isolated. With the intense brown color and brilliance and an esthetic contrast with the snowy white matrix. Nowadays, it is very difficult to find specimens with this quality or any other quality...

Size: 8.8 x 4.5 x 3.8 mm.
Main crystal: 18 x 8 mm.

Ex. Schick collection


RM493   Microcline, variety amazonite

Pikes Peak, Teller Co., Colorado, United States

Elegant crystal of amazonite, a variety of microcline, good size, from a classic American locality. This crystal shows many faces delimited by triclinic pinacoids, along with growth in the upper faces. Good color and transparency when the light hits on the edges.

Size: 5,2 x 4,8 x 3,5 cm.