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Mineral Specimens with Paravauxite
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3.6 x 3.0 x 1.0 cm. Here we have a superb, very well crystallized, outstanding blue specimen consisting of radiating crystal aggregates of Vauxite associated with minor light green Paravauxite on clay matrix.
11.5 x 6.3 x 3.6 cm. This piece features superb, sharp, lustrous, light green crystals of Paravauxite measuring up to 7 mm on matrix. This piece is a great example of the prismatic, sheaf-like parallel growths described by Mark Bandy.
5.1 x 3.5 x 1.8 cm. This particular piece is a remarkable, very well crystallized specimen consisting of small, bladed, beautiful blue color, radiating aggregates of Vauxite hosting a lovely "bow tie"-shaped aggregate of layered greenish Paravauxite on minor clay matrix.
8.0 x 4.6 x 2.7 cm. This piece features superb, incredibly rare, sharp, sparkling, lustrous, light green crystals of Paravauxite measuring up to 0.8 cm with tan colored crystal of Sigloite on matrix. Sigloite forms as the result of alteration from Paravauxite. This specimen is from the type locality for both species. Mark Chance Bandy described Paravauxite crystals in his book "Mineralogy of Llallagua, Bolivia". He states that Paravauxite is the most abundant of all the "Vauxites" from this mine." This piece is a superb example of the prismatic, sheaf-like parallel growths that Mr. Bandy described.
6.7 x 4.0 x 1.7 cm. From the find of 2006. This particular piece is a remarkable, very well crystallized, rare specimen consisting of small, bladed, beautiful blue color, radiating aggregates of Vauxite associated with micro fibrous strands of colorless Metavauxite, along with micro tabular blades of Paravauxite and small whitish spheres of Wavellite plus a few scattered Quartz crystals on firm Quartz-Diorite porphyry matrix. This piece is from the type locality for Vauxite, Paravauxite and Metavauxite which was discovered along the Contacto and San Jose veins in this mine and was first described by Sam Gordon and Mark Bandy.
23.7 x 18.0 x 5.0 cm. A rich plate with dozens of sharp, translucent, beautiful crystals running all over it, to 1.2 cm in length; and many of which are doubly-terminated. A vein of some white phosphate material runs through the middle. Coverage on the back is more sparse, but with larger crystals to 1.75 cm. Almost certainly this was field-collected on one of the famous Vaux expeditions in the early 1900s. TYPE LOCALITY MATERIAL: Paravauxite was described in 1922. Ex. Philadelphia Academy of Sciences Collection.
11.2 x 10.3 x 3.4 cm. A rich plate with dozens of sharp, translucent, beautiful crystals running all over it, to 1.2 cm in length; and many of which are doubly-terminated. A vein of some white phosphate material runs through the middle. Almost certainly this was field-collected on one of the famous Vaux expeditions in the early 1900s. TYPE LOCALITY MATERIAL: Paravauxite was described in 1922. Ex. Philadelphia Academy of Sciences Collection.
16.6 x 11.0 x 2.6 cm. A rich plate with dozens of sharp, translucent, beautiful crystals running all over it, to 1.2 cm in length; and many of which are doubly-terminated. A vein of some white phosphate material runs through the middle. Almost certainly this was field-collected on one of the famous Vaux expeditions in the early 1900s. TYPE LOCALITY MATERIAL: Paravauxite was described in 1922. Ex. Philadelphia Academy of Sciences Collection.
12.4 x 8.0 x 7.3 cm. This is a bizarre columnar wavellite specimen with "sheets" of wavellite, cave formations in appearance, on which are hung hundreds of minute gemmy, sparkling crystals of Paravauxite. Mixed amidst them are some zones of small blue microcrystalline vauxite, as well. This is the type locality for both species. According to museum records, this was collected by Sam Gordon, then-curator, on one of the early Vaux expeditions in the 1920s. Ex. Academy of Natural Sciences Philadelphia Collection.
3.6 x 3.3 x 1.7 cm. This piece features superb, rare, sharp, sparkling, lustrous, light green crystals of Paravauxite with tan colored crystal of Sigloite on iron-stained Wavellite on matrix. The largest crystal measures 0.5 cm. Sigloite forms as the result of alteration from Paravauxite. This specimen is from the type locality for both species. Mark Chance Bandy described Paravauxite crystals in his book "Mineralogy of Llallagua, Bolivia". He states that "Paravauxite is the most abundant of all the "Vauxites" from this mine," and with that said, you almost never see specimens, especially pieces that are larger than thumbnails available on the market. This piece is a fine example of the prismatic, sheaf-like parallel growths that Mr. Bandy described.
9.1 x 6.0 x 2.3 cm. From the find of 2006, this is undoubtedly one of the most significant discoveries ever made at this locality. These are some of the largest overall Vauxite specimens in the world, but the greatest aspect of these pieces is two-fold. First, the Vauxite itself is associated with micro fibrous "strands" of the super rare phosphate Metavauxite, plus tabular micro crystals of Paravauxite and small whitish spheres of Wavellite. It is incredibly rare to have four individual phosphate species all on one specimen, and the fact that this mine is the type locality for Vauxite, Paravauxite and Metavauxite makes it all the better. There are also some small gem Quartz crystals on most of the specimens found as well. The second significant attribute of these specimens is the fact that they formed on a solid Quartz-Diorite porphyry matrix and not crumbly clay (possibly after Allophane). This particular piece is a remarkable, large, very well crystallized, rare specimen consisting of small, bladed, beautiful blue color, radiating aggregates of Vauxite associated with micro fibrous strands of colorless Metavauxite, along with micro tabular blades of Paravauxite and small whitish spheres of Wavellite plus a few scattered gem quality Quartz crystals on firm Quartz-Diorite porphyry matrix. This piece is from the type locality for Vauxite, Paravauxite and Metavauxite which was discovered along the Contacto and San Jose veins in this mine and was first described by Sam Gordon and Mark Bandy.
5.2 x 3.3 x 1.2 cm. From the new find of 2008, this is another great discovery for this locality. This particular piece is a remarkable, very well crystallized, very rare, specimen consisting of small, bladed, beautiful blue color, radiating aggregates of Vauxite coated with tabular blades of greenish-white Paravauxite on minor clay (probably decomposed Allophane) matrix. I have photographed the Vauxite and Paravauxite crystals under high magnification to show that they are truly terminated crystals and not just a mass. There are also some small golden Childrenite crystals on the specimens as well. This piece is from the type locality for Vauxite and Paravauxite which were originally discovered along the Contacto and San Jose veins in this mine and first described by Sam Gordon and Mark Bandy. It is so unbelievably rare to find good size, beautifully crystallized specimens of Vauxite and Paravauxite together from Bolivia like this one.
8.0 x 4.0 x 2.1 cm. This attractive specimen features beautiful lustrous, water-green Paravauxite crystals and some minor tan Sigloite crystals associated with micro crystallized iron-stained Wavellite needles on matrix. Sigloite forms as an alteration of Paravauxite. The largest Paravauxite crystal measures up to 0.8 cm. This specimen is from the type locality for both species. Mark Chance Bandy described Paravauxite crystals in his book "Mineralogy of Llallagua, Bolivia". He states that Paravauxite is the most abundant of all the "Vauxites" from this mine. This piece is a great example of the prismatic, sheaf-like parallel growths that Mr. Bandy described.
18.3 x 11.4 x 3.3 cm. From the new find of 2006, this is undoubtedly one of the most significant discoveries ever made at this locality. Not since the days of World War II has there been such a remarkable find of this material. These are some of the largest overall Vauxite specimens in the world, but the greatest aspect of these pieces is two-fold. First, the Vauxite itself is associated with micro fibrous "strands" of the very rare phosphate Metavauxite, plus tabular microcrystals of Paravauxite and small whitish spheres of Wavellite. It is incredibly rare to have four individual phosphate species all on one specimen, and the fact that this mine is the type locality for Vauxite, Paravauxite and Metavauxite makes it all the better. There are also some small gem Quartz crystals on most of the specimens found as well. The second significant attribute of these specimens is the fact that they formed on a solid Quartz-Diorite porphyry matrix, and not crumbly clay (after Allophane) which means that they are much more sturdy. This piece is from the type locality for Vauxite, Paravauxite and Metavauxite which was discovered along the Contacto and San Jose veins in this mine and was first described by Sam Gordon and Mark Bandy.
6.5 x 5.0 x 2.5 cm. From the find of 2006, this is one of the most significant discoveries ever made at this locality. Not since the days of World War II has there been such a remarkable find of this material. These are some of the largest overall Vauxite specimens in the world, but the greatest aspect of these pieces is two-fold. First, the Vauxite itself is associated with micro fibrous "strands" of the very rare phosphate Metavauxite, plus tabular micro crystals of Paravauxite and small whitish spheres of Wavellite. It is very rare to have four individual phosphate species all on one specimen, and the fact that this mine is the type locality for Vauxite, Paravauxite and Metavauxite makes it all the better. There are also some small Quartz crystals on most of the specimens found as well, which is really a nice accent to these already amazing pieces. The second significant attribute of these specimens is the fact that they formed on a solid Quartz-Diorite porphyry matrix, and not crumbly clay (after Allophane) which means that they are much sturdier. This piece is from the type locality for Vauxite, Paravauxite and Metavauxite which was discovered along the Contacto and San Jose veins in this mine and was first described by Sam Gordon and Mark Bandy. It is very rare to find good size matrix specimens of Vauxite from Bolivia with Paravauxite and Metavauxite.
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Rob Lavinsky, rob@irocks.com
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share specimen![Vauxite, Paravauxite from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosí Department, Bolivia [db_pics/mdpics/MD-185366a.jpg]](db_pics/mdpics/MD-185366a.jpg)
![Vauxite, Paravauxite from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosí Department, Bolivia [db_pics/mdpics/MD-185366b.jpg]](db_pics/mdpics/MD-185366b.jpg)
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![Paravauxite from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosí Department, Bolivia [db_pics/mdpics/MD-185384b.jpg]](db_pics/mdpics/MD-185384b.jpg)
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![Paravauxite, Sigloite from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosí Department, Bolivia [db_pics/mdpics/MD-196006b.jpg]](db_pics/mdpics/MD-196006b.jpg)
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![Vauxite, Paravauxite, Metavauxite from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosí Department, Bolivia [db_pics/mdpics/MD-196010b.jpg]](db_pics/mdpics/MD-196010b.jpg)
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![Vauxite, Paravauxite, Metavauxite from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosí Department, Bolivia [db_pics/mdpics/MD-210580c.jpg]](db_pics/mdpics/MD-210580c.jpg)
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![Vauxite, Paravauxite, Metavauxite from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosí Department, Bolivia [db_pics/mdpics/MD-228508a.jpg]](db_pics/mdpics/MD-228508a.jpg)
![Vauxite, Paravauxite, Metavauxite from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosí Department, Bolivia [db_pics/mdpics/MD-228508b.jpg]](db_pics/mdpics/MD-228508b.jpg)
![Vauxite, Paravauxite, Metavauxite from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosí Department, Bolivia [db_pics/mdpics/MD-228508c.jpg]](db_pics/mdpics/MD-228508c.jpg)
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![Vauxite, Paravauxite, Metavauxite from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosí Department, Bolivia [db_pics/mdpics/MD-229558b.jpg]](db_pics/mdpics/MD-229558b.jpg)