ex. Chuck Houser
Another urban mineral specimen, from excavations in the northern San Diego County town of Fallbrook. These are crudely terminated andalusites, though covered atop by a drapery of muscovite. Unusual!
Though Andalusite is well known throughout the gem world, there are very few world localities for fine quality gems. This stone is a virtually eye clean trichroic red, orange and green "Cushion" cut gem. The multicolor pleochroism of Andalusite is distinctive and extremely attractive. It is difficult to find stones in this size with this clarity.
6.0 x 6.0 x 5.7 cm. An OLD-TIME, CLASSIC and aesthetic cluster of blocky, olive-brown andalusite crystals to 3.0 cm on matrix from a famous Austrian locality - Lüsens Valley, Tyrol. The crystals may be pseudomorphs of pinite after andalusite. This excellent piece is accompanied by two old labels, from Ward’s and from Hugh Ford, a major New York City dealer from 1947-1957. Ex. Richard Hauck Collection.
4.5 x 2.7 x 2.3 cm. Andalusite variety viridine is an ULTRA-RARE manganese-rich andalusite. This UNIQUE specimen features large, blocky, DISCRETE, grass-green to brown viridine crystals on a bit of matrix. I have NEVER seen another like it and believe it is unheard of! The locality, itself, is UNIQUE - Conquista, Bahia, Brazil. Dr. Fred Pough, famous mineralogist, author and curator must have collected or obtained this striking and unusual piece while in Brazil during World War II. Ex. Elling Collection.
5.2 x 3.8 x 2.6 cm. This large crystal of andalusite has good form and a pleasing orange-brown color with minor translucence. It is extremely unusual in its robust form and completeness. Ex. Martin Zinn Collection.
14.6 x 10.7 x 0.2 cm. So-called Chiastolite (a species name discredited some time ago) is a variety of Andalusite containing cross-shaped inclusions of carbon that make the crystals very distinct. Somebody went to a lot of trouble and time to make this attractive reference set of thin-sections, cut from the cores of over a dozen crystals. The set was obviously made up to show the different patterns possible within, perhaps to better study their formation. Shown in normal light and in backlit lighting. Ex. Academy of Natural Sciences Philadelphia Collection.
11.4 x 7.8 x 5.4 cm. An old-time Alpine specimen (from the Tyrolean Alps in Austria, not Swiss) of blocky, rectangular, translucent crystals of andalusite (part of the sillimanite group (Al2SiO5 = AlAlOSiO4). The crystals are embedded in grey graphite schist. Frequently, these crystals show a cross-shaped pattern of light and dark inside. This locality in the Alps is known as a classic locality for andalusite.
An attractive and colorful example of this very rare and interesting green andalusite species, with the color due to manganese (why it makes it green instead of red, I do not know!). This specimen is, I am told, VERY good for what it is and was long in the possession of Fred Pough, who brought it up from Brazil in the 60's. It came out of his collection with a hastily handwritten label, in a recent trade a friend of mine did with him. 5 x 3 x 2.5 cm
This andalusite specimen passed from an old collection in New York to Richard Hauck at some point, and thence to us. What you see here are three startlingly clear and sharp crystals, with the internal "crosses" that make variety of andalusite so unique. These crosses consist of either clay or carbonaceous materials included inside the crystals in regular patterns (which can vary - you can see that a couple of them have circles in the middle at the crux of the cross). There is just nothing like these out there, and you don''t see them around! Real conversation pieces . . . 8.3 x 6.5 x 5.1cm
This specimen is comprised of several, blocky, muted luster, brownish-green, andalusite crystals, to 3.0 cm, in length. These crystals are huge for the species, and it is an exceptional specimen overall for the size and aesthetics. 7.5 x 5.4 x 5.4 cm
ex. Martin Zinn
This large crystal of andalusite has good form and a pleasing orangy-brown color with minor translucence. It is extremely unusual in its robust form and completeness, the best of this late-90s find that i can recall.
ex. Philadelphia Academy of Natural Sciences
So-called Chiastolite (a species name discredited some time ago) is a variety of Andalusite containg cross-shaped inclusions of carbon that make the crystals VERY distinct, for obvious reasons. Somebody went to a lot of trouble and time to make this attractive reference set of thin-sections, cut from the cores of over a dozen crystals. The set was obviously made up to shwo the different patterns possible within, perhaps to better study their formation. Shown in normal light and, dramatically, in backlit lighting.
ex. Richard Hauck
This specimen is comprised of several, blocky, muted luster, brownish-green, andalusite crystals, to 3.0 cm, in length. These crystals are huge for the species, and it is an exceptional specimen overall for the size and aesthetics.
A wonderful, bright, well-cut, virtually eye clean, trichroic red, orange and green Emerald cut gemstone of Andalusite. The pleochroism of Andalusite is distinctive, attractive and truly helps to easily identify the material. It is difficult to find stones such as this one with great saturation and multi-color display! This is a relatively large stone for this material and is from an old stash of rough from the 1960's.
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