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Popular gemstones and cabochons:
Amazonite
Parrot Wing Understand mm sizes: Quick guide: 1" = 25mm 1/2"=13mm 1/4"=6.5mm Change can help: 1 quarter= 24.2 mm 1 dime= 18mm Both coins: 42mm |
For jewelers who tend to think of metals as existing outside our gemstones, this page might come as a surprise. These unusual cabs contain copper, silver, or pyrite, in visible form. The stones have their own glimmer and gleam, making for all sorts of exciting design possibilities. Scroll down and savor, or click on one of the following choices: Copper Silver Titanium Covellite Native Copper Copper long slumbered as a "cheap" material, but recently copper prices have skyrocketed and jewelers are taking a second look at the possibilities of this colorful metal. Below are the creme de la creme of copper cabochons: Heavy with real copper, their gleaming surfaces also boast interesting patterning created by the surrounding matrix. These are all the Native Copper pieces that I have in stock.  Native Copper Keweenaw County, Michigan 21.5 mm cushion, 5.32 g MT77 $34.00
MT163 $38.50
This delightful stone has a field of creamy white interspersed with copper that has a bright metallic shine in some lights, and turns a beautiful wine red in others. From the Campbell Mine in Bisbee, Arizona. Click on the photos for a better look. Most of the darker or brownish areas in these photos are beautiful shining copper, often with rich red accents.
Campbellite
Campbell Shaft, Bisbee, AZ
MT117 $30.00
MT127 $52.00
MT190 $70.00
Kingston Conglomerate Copper What a pretty stone this is, a mosaic of rich chestnut and shining copper. It comes from the Kingston Mine, located on the Keweenaw peninsula in the upper peninsula of Michigan. According to Mr. Jack Keck of Houghton, MI, who wrote in with firsthand information as he worked for the mining company, the mine itself has been closed since 1967, making the supply of this material limited. The metal gives each stone both beauty and heft. Click on photos to see more detail.
MT97 $49.50
MT100 $52.00
MT106 $58.00
Copper Fire Brick This isn't an official "mineral," nor is it pure metal: It's the copper that stuck to the fire brick walls of the smelters in copper ore processing plants in Northern Michigan. It's really interesting material: Smooth and glimmery without being too shiny, with glints of red here and there, and the cream-colored mosaic pattern of fire brick chips caught forever in the metal. Most of these smelters are no longer in operation, so each cab contains a little bit of the history of the Upper Midwest. Each piece has the weight of metal, and a patina like antique copper. A really wonderful stone for people who work in, or just love, copper.  Copper Fire Brick Michigan 21.5 x 21 mm MT63 $32.00
MT64 $32.00
MT70 $22.00 These are stunning stones, composed of silver just as it is taken from the ground, in a creamy white matrix. I can't explain why, but the silver in these stones these just doesn't seem to tarnish over time. Perhaps it's because they haven't gone through a refining process. Silver doesn't like to be photographed: To understand what you're seeing in these photos, just picture that the dark grey and black areas of the stones are, in person, very shiny polished silver that looks very smooth to the eye. The metal makes them heavier than usual, so they feel very substantial, as well. I have included the weights of the heavier (more than 10g) stones. Remember that one ounce = 31 grams. All pieces have satin-finish backs. Click on photos to get a better look. 
Native Silver and Cobalt Canada MT195 $150.00
 Native Silver and Cobalt Canada 29.5 x 19.5 mm MT199 $40.00
 Native Silver and Cobalt Canada 26.5 x 17.5 mm MT201 $34.00
 Native Silver and Cobalt Canada 21 x 14.5 mm, 6 mm thick MT204 $34.00
MT207 $34.00
 Native Silver and Cobalt Canada 23 x 16 mm MT208 $32.00
 Native Silver and Cobalt Canada 17.5 x 15 mm MT215 $18.00 Parallel-Growth Titanium Crystals Titanium is a strong but lightweight, lustrous, corrosion-resistant metallic element. Usually, it is incorporated into alloys that have a variety of industrial applications. When immersed in a special bath with electrical current running through it, titanium changes from dull grey to a rainbow of colors, depending upon how long it's electrified. Artists love using titanium in jewelry, and here's a totally new creative application: These cabs, by Greg Genovese, are composed of actual titanium crystals which have grown side-by-side into a solid mass. The structure of the crystals makes wonderful, three-dimensional designs, accented by colors that shift from deep marine blue, to glowing magenta. All are about 5 to 6.5 mm thick, so they can be easily bezel-set.
MT254 $120.00
MT253 $100.00 Sorry, Sold!
MT248 $90.00
Next page: Pearls Previous page: Greens To get an overview of all our stone pages, go to: Designer Gems To check what you've ordered so far, click:
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Heart of Stone Studio Gemstones
Cabochons
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