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7 specimens listed
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Topaz - classic Mexican gem crystals
stock #23.1-559
Tepetate, Municipio de Villa Arriaga
San Luis Potosi, Mexico
2.5 x 2.1 x 1.3 CM ()
price: $160
Pre Tucson

A pair of gemmy crystals with good cognac color jut out from the matrix. A classic Mexican habit for Topaz, this is the desired type from the famed Tepetate in San Luis Potosi. An excellent thumbnail that displays super well and is still affordable. Vintage 1970-80 era. These were common and affordable at one time, now we never see new pieces but many older collections still hold some nice ones.

Calcite - stacked hexagons
stock #AX-12-440
San Luis Potosi, Mexico
3.8 x 3.4 x 3.3 CM (miniature)
price: $130
new year 2021

A classic habit Calcite from Charcas, Mexico which is a stack of thick (and a few thin) hexagons in a staggered alignment. Vividly fluorescent as well, the luster is bright on the side faces, the flat terminal faces are a pearly matte so much less shiny. The bottom has contacts but there is no damage. Translucent to slightly transparent, the crystals are internally zoned.

Hyalite Opal - Vintage specimen 1895
stock #20.1-296

San Luis Potosi, Mexico
9.6 x 8.4 x 5.4 CM (cabinet)
price: $330

This is both a nice specimen and a fine historic piece as well. The specimen has a slightly faded affixed label from the remarkable collection of Wallace Gould Levison. Details from his ledger (we include a photocopy of the page) says" Bought from William Niven in his new store at 14th street and Broadway (NYC) April 18, 1895". Niven was an important minerologist born in 1850 who was an early partner with the famed dealer George English, later an independent dealer in New York. The specimen is vividly fluorescent and the Hyalite Opal is perfectly transparent looking like bubbles covering a purplish Chalcedony matrix. The only location given in the notes is San Luis Potosi, this is almost certainly from Tepetate. A very choice piece that is both esthetic and a nice piece of History.

stock #19.1-255
San Luis Potosi, Mexico
2.1 X 1.6 x .8 CM (thumbnail)
price: $160
Spring 2019

A pair of perfect small Fluor Buergerite crystals are laying on contrasting matrix. From the type locale, this rare member of the Tourmaline group is only available from older pieces like this, none has been found for decades. No damage, a well composed thumbnail.

Fluor-Buergerite -type locality
stock #18.1-291
San Luis Potosi, Mexico
1.5 x 1.2 x .9 CM (thumbnail)
price: $390
Worldwide mix summer

Unusually well formed thumbnail of the rare Tourmaline specie Fluor-Buergerite from the type locality. These were found just once in the 1960 era and not since. This main crystal at 1.2 CM is very large for the specie and especially choice. Chocolate brown and in excellent condition, this has a very attractive arrangement with a cluster of smaller crystals and a tiny matrix. Formerly named Beurgerite, this is not often available and very rarely in such a sharp, textbook form.

Calcite - optically clear single crystal - ex. W. I. Johansson
stock #15.1-719
San Luis Potosi, Mexico
4.5 x 3.1 x 2.2 CM (miniature)
price: $300
Winter 2016-17

Slightly frosted on some faces, sharp, clear and in fine condition, this old specimen is from 1960s vintage finds at Charcas. Selective frosting adds to the visual interest and the form is textbook perfect. The termination shows a nice effect with the selected areas outlining a central hexagon. Nothing quite like these Calcites has since been found.

stock #AX-29-059
San Luis Potosi, Mexico
6.4 x 6 x 3 CM (cabinet)
price: $275
pre Tucson 2015 update

Great color and luster, this is a Datolite from Mexico that looks much more like a good Russian specimen. From a small find in late 2013, this has the form, clarity and quality of the top few percent. Some edge chipping/contacts is inevitable but overall in very good condition.