A choice example of Rosasite from Tsumeb, this is formed on and next to Malachite which has formed over Mimetite. Several Mimetite crystals have also formed on top of the Rosasite, adding a nice color contrast. The central "tower" of botryoidal Rosasite is about 2.5 CM (inch) tall, with a velvet luster that gives a nice focus to the specimen. Tsumeb is unquestionably the locality that has best mixed many beautiful secondary minerals of diverse elements, habits and forms.
SOLD Rosasite inside Gypsum on Dolomite
stock #SOLD 20.1-829
Bou Beker, Touissit -Bou Beker mining district, Jerada Province
7.8 x 5.7 x 2.2 CM (cabinet)
new year 2021
From a very unusual find a few years ago at the Bou Beker Mine in the Touissit complex in Morocco. A Matrix of pink Dolomite crystals is the background for colorless gypsum in two generations with both prismatic clear crystals and colorless balls. The spherical globs are colored by inclusions of blue-green Rosasite and a few small spots are a darker green from Malachite crystals best seen under magnification. In perfect, undamaged condition, this is a much more dense and colorful example than usual from the find. Previously in my personal collection, these were plentiful at one time and very affordable, they are still a very good value. Early on some dealers had labeled these as Devilline inclusions, but that was incorrect. Choice and colorful, a lustrous and unusual specimen of a sort that is just not found any place else and now rarely available in any quality.
Mina Ojuela, Mapimi
6.8 x 5.7 x 2.6 CM (cabinet)
new year 2021
A flat matrix with one face well covered with botryoidal Rosasite balls. Excellent velvet luster and sheen, the color grades from a dark green to a lighter blue green. This is the old style of Rosasite from the 1960's the matrix is a soft gossan but is quite stable. The color and luster of a good Rosasite should look like this. This locality at one time produced lots of this distinctive Copper specie and some small finds still pop up, it has made these an excellent value for such an esthetic mineral.
Spheres of blue Rosasite scattered on Smithsonite and some Calcite. A good locality piece that is especially fine under magnification. The Silver Bill mine has a long history but is not very well known outside of Arizona. It has been a source of Wulfenite and other species as well as Rosasite.
One of the more famed Pseudomorphs from Tsumeb is Rosasite replacing Malachite that has replaces Azurite crystals. This is an excellent example with a thin outer zone of Rosasite that has several small Calcite rhombs sprinkled on the surface. Attractive and now quite uncommon, the main crystal is in perfect condition. Other crystals on the back and bottom side are broken showing the malachite core, does not affect display. A big thumbnail with a lot of good visual impact.
Mina Ojuela, Mapimi
4 x 4.1 x 2.9 CM (cabinet)
new june 17
A free-form sculpture of velvety Rosasite from Ojuela. This seems to have formed over a gossan matrix most of which has been etched away leaving this botryoidal mass of Rosasite. Fine color, this is nearly all Rosasite not just a thin coating. From a find in 2012 that was one of the best pockets of Rosasite seen in decades, this is a very attractive piece in great condition.
A really colorful dark green Rosasite with Malachite on a matrix of clear rhombs of Calcite. The specimen is covered with small spheres and botrytoids of velvety Rosasite intermixed with Malachite. The condition is choice and the contrast with the white Calcite crystals sets everything off well. A little different esthetics than the usual Rosasite.
A fine and esthetic "treelike" or cruller specimen of velvety Rosasite on and mixed with malachite. There are some small Calcites as well for a little extra sparkle. Mina Ojuela has produced the best Rosasite known, usually in finds often decades apart. This was from the last find in 2011, mostly low quality but with a few outstanding pieces. I selected this from a small group of the very best. While not large, it has great color, form and eye appeal that make it an affordable yet worthy addition for any collection.