The Mockingbird Mine, Mariposa County, California
Collector’s Edge Minerals, Inc. recognizes and thanks Rocks & Minerals for permission to use portions or all of their original article from “Rocks & Minerals”, Volume 83, Number 5, pp. 392-400. Contributing authors were Robert B. Cook, Department of Geology,...
Red Lead Mine, Dundas Region, Tasmania, Australia
Collector’s Edge Minerals, Inc., through a partnership agreement with the owner, reopened the Red Lead mine in the Dundas Region, Tasmania, Australia in October 2012 to mine high quality crocoite specimens.
Red Cloud Mine, La Paz County, Arizona
In 2001 Colorado Calumet Co, Inc. (CCCI), acquired the Red Cloud mine from Wayne Thompson et.al. The mine is a small silver-lead deposit located in the arid and desolate southwest corner of Arizona, and CCCI worked the claim
Maynard Topaz Claim, Thomas Range, Juab County, Utah
Topaz has been found around the world. However, the Maynard Claim in Utah is known for its imperial sherry color, though not all are of this color. It can range from deep sherry to colorless, from gem quality to those
The Stoneham Barite Locality, Stoneham, Colorado – 2
Calcite at Stoneham ranges from pale yellow to deep honey-colored; solid, inter-grown layers tend to appear a deeper brownish yellow. Distinct crystals of calcite form rhombohedra, sometimes modified or distorted, and typically 2-4 mm in size.
The Stoneham Barite Locality, Stoneham, Colorado
Collector’s Edge Minerals, Inc. recognizes and thanks Rocks & Minerals for permission to use portions or all of their original article from the “Rocks & Minerals”, Volume 65, Number 3, pp. 202-222. Contributing authors were Peter J. Modreski, U.S. Geological...
Two Point Amazonite Mine, Teller County, Colorado, Part 2
Amazonite: K(AlSi3O8) Amazonite is a green microcline feldspar, with a hardness on the Moh’s scale of 6-6-1/2. It forms in the triclinic crystal system. Studies suggest that the color is the result of small quantities of lead and water in the feldspar. ...
Two Point Amazonite Mine, Teller County, Colorado
In June, 1997, a beautiful pocket of blue-green microcline (v. amazonite) specimens was discovered in the classic Lake George, Colorado amazonite mining area. The specimens were discovered 2 meters beneath the surface, inside a collapsed pocket, eventually named the...
The Wutong Rhodochrosite Mine, Guangxi Zhuang Autonomous Region, China
Collector’s Edge Minerals, Inc. recognizes and thanks the Mineralogical Record for permission to use portions or all of their original article from the “Mineralogical Record”, Volume 42, Number 6, pp. 521-544. Contributing authors were Bryan Lees and Steve Behling,...
Benitoite Gem Mine, San Benito County, California
Benitoite is one of the world’s rarest gemstones and possesses many unique qualities compared to other gems. It has a high index of refraction and a dispersive power that is higher than diamond, making the stone extraordinarily bright and fiery when cut.
Concerning Cataloging
Keeping track of your collection is important for so many different reasons like insurance purposes, remembering species, locations, and stories, and just knowing what you have. It also helps when you’re shopping and you’re not sure if you want to upgrade or don’t...
The Sweet Home Mine, Park County, Colorado, USA
The Sweet Home Mine, in Alma, Colorado has produced many of the world’s best rhodochrosite specimens. It’s bright red color and gemmy interior place this mineral among the most desirable of all mineral species. The “Alma King”, and many other world-class specimens were discovered in this mine.
The Sweet Home Mine, Alma, Park County, Colorado – 2
Other Minerals: The Sweet Home mine rhodochrosite crystals have overshadowed reports of the other species from the mine (Caplan, 1936). Little information is found in standard mineralogical references. For example, two noteworthy species known from the mine,...