Calcite crystals richly included by Copper in branching clusters which gives the Calcite a distinctive color. A very old Dartmouth College Museum and a Carl Bentley labels are included. some Copper is seen outside of the Calcite as well. Choice, minimal damage on outer edges but all the main Calcite is clean and undamaged. A good USA classic copper specimen that is far more affordable than typical.
A native Silver crystal tree with contrasting white Calcite scattered on the branches. Classic specimen from the famed White Pine Mine of Michigan. The crystals are typically crude but distinct enough to see the basic forms well. No damage and displays well, a choice miniature with character.
Wonderful esthetics! Slender wires in branches holding spinel twinned Copper crystals in Herringbone arrays. A very old specimen from the famed Phoenix mine, in perfect condition. A superb, textbook example of these habits that is much more delicate than most Phoenix specimens. Under magnification it seems a small dab of Silver is present as well as a small modified cube. It is remarkable that this piece has remained intact.
Copper with and in Calcite
West Vein, Phoenix Mine, Phoenix, Keweenaw County
6.8 x 3.4 x 2 CM (cabinet)
Pre Holiday 2017
Esthetic and not typical at all! Native Copper in leafy tendrils holds and is inside very clear crystals of Calcite. The Calcite is in blocky cube forms with complex growth hills on some faces and colored by the inclusions a bright Copper hue. The Calcites are glassy and the whole composition is very attractive. Some contacts are noted mostly on the backside of the specimen, overall in fine condition. I have not seen another of this style in many years.
An old specimen from Houghton County with sizable (2 CM) distinct yet crude crystals standing above a mostly Copper matrix. Some sharp faces are seen but overall the crystals are very distorted. A few spots of Native Silver are also seen with magnification.
Perfectly formed Chamosite pseudo having the shape of the original Garnet (probably Almandine). Unlike most from this classic find, this is a matrix specimen, and the crystal is not rounded but is very sharp. These were first collected over 130 years ago (at that time called Aphrosiderite, a discredited name) and still are sometimes found, but rarely of good quality. A nice affordable classic pseudomorph.
A sculptural specimen with a sharp distinct main dodecahedral crystal perched on a copper stalk. Esthetic and choice old piece that oddly looks like a goose from some angles. Ex. Warren Johannsen collection likely pre 1940 vintage.
Silver crystals on Copper crystals
Osceola Mine, Osceola, Houghton County
4.9 x 2.7 x 1.6 CM (miniature)
pre Tucson 2015 update
An odd yet quite attractive specimen which is very well crystallized. The matrix is mostly all copper, some of it is crystallized with flattened octahedra and some standing fingers of crystals. The main event is the Silver that is crystallized in twisting fingers and branches contrasting to the copper. A little Malachite and a blue mineral (Chalcanthite?) are visible too. The blue could be cleaned off but it adds interest as is in my opinion. The condition is perfect, the esthetics are distinctive and not typical.