Cliff Mine, Pheonix, Keweenaw County
16.1 x 2 x .5 CM (cabinet)
An antique native copper "finger" or "fan blade" made by skilled hand chiseling long ago. These artifacts were made by miners from the often huge masses of pure Copper encountered in the Upper Penninsula of Michigan. From the John Marshall collection, this is recorded as from the Cliff Mine, such attributions of these artifacts are quite uncommon. Aside from the very hard labor of hammering through solid copper, these fingers required a lot of skill to create such a long straight and clean blade. While not a typical mineral specimen this is a very much a classic Native Copper that has had a major trimming job!
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.