Tarnished native silver from the Tertiary of Colorado, USA. (public display, Leadville Mining Museum, Leadville, Colorado, USA)
A mineral is a naturally-occurring, solid, inorganic, crystalline substrance having a fairly definite chemical composition and having fairly definite physical properties.  At its simplest, a mineral is a naturally-occurring solid chemical.  Currently, there are over 4900 named and described minerals - about 200 of them are common and about 20 of them are very common.  Mineral classification is based on anion chemistry.  Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.
Elements are fundamental substances of matter - matter that is composed of the same types of atoms.  At present, 118 elements are known (four of them are still unnamed).  Of these, 98 occur naturally on Earth (hydrogen to californium).  Most of these occur in rocks & minerals, although some occur in very small, trace amounts.  Only some elements occur in their native elemental state as minerals.
To find a native element in nature, it must be relatively non-reactive and there must be some concentration process.  Metallic, semimetallic (metalloid), and nonmetallic elements are known in their native state as minerals.
Silver is part of the gold-group of metallic elements.  Silver is a precious metal, but is far less valuable than gold or platinum.  Silver usually occurs as a silver sulfide mineral, but it also occurs in nature in its native state, often in the form of twisted wires.  Silver is moderately soft and has a silvery-white color on fresh surfaces that tarnishes to darker colors.  Elemental silver in nature is often found alloyed with other metals.  Naturally alloyed gold-silver is called electrum.
The tarnished silver mass shown above is a 28 ounce silver "nugget" from Colorado's famous Smuggler Union Mine.

Locality: Smuggler-Union Mine, Telluride, San Juan Mountains, Colorado, USA
Tarnished native silver from the Tertiary of Colorado, USA. (public display, Leadville Mining Museum, Leadville, Colorado, USA) A mineral is a naturally-occurring, solid, inorganic, crystalline substrance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 4900 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates. Elements are fundamental substances of matter - matter that is composed of the same types of atoms. At present, 118 elements are known (four of them are still unnamed). Of these, 98 occur naturally on Earth (hydrogen to californium). Most of these occur in rocks & minerals, although some occur in very small, trace amounts. Only some elements occur in their native elemental state as minerals. To find a native element in nature, it must be relatively non-reactive and there must be some concentration process. Metallic, semimetallic (metalloid), and nonmetallic elements are known in their native state as minerals. Silver is part of the gold-group of metallic elements. Silver is a precious metal, but is far less valuable than gold or platinum. Silver usually occurs as a silver sulfide mineral, but it also occurs in nature in its native state, often in the form of twisted wires. Silver is moderately soft and has a silvery-white color on fresh surfaces that tarnishes to darker colors. Elemental silver in nature is often found alloyed with other metals. Naturally alloyed gold-silver is called electrum. The tarnished silver mass shown above is a 28 ounce silver "nugget" from Colorado's famous Smuggler Union Mine. Locality: Smuggler-Union Mine, Telluride, San Juan Mountains, Colorado, USA

National Mining Hall of Fame

Mining in the United StatesHalls of fame in ColoradoMining museums in ColoradoMuseums in Lake County, ColoradoPatriotic and national organizations chartered by the United States Congress
4 min read

The rent is fifty cents a year. That was the deal Richard Moolick negotiated with the city of Leadville in the late 1980s -- a 110-year lease at half a dollar annually -- to house the National Mining Hall of Fame and Museum in a building that had served as both the town's high school and junior high. The mines that once sustained Leadville had closed, contributions were drying up, and the museum originally planned for Colorado School of Mines land in Golden needed a new home. What Leadville offered was not just cheap real estate but authenticity: a mining town with 67 historic mines on its doorstep, placing the nation's only congressionally chartered mining museum in the very landscape it commemorates.

From Schoolhouse to Shrine

The museum was incorporated in 1987, but the road to opening was anything but smooth. The original plan called for construction on land owned by the Colorado School of Mines in Golden. Then Leadville's mines began closing in the 1980s, and potential donors withdrew their pledges. Doug Watrous, the project chairman, sent board director Richard Moolick to negotiate with Leadville, and the city came back with an offer no one could refuse: fifty cents a year for 110 years. Still short on funds, former state senator Joe Shoemaker proposed finding 100 contributors willing to donate one thousand dollars each. It took a full year, but every dollar was raised. In 1988, the museum moved into the former Leadville school building. President Ronald Reagan signed the Congressional charter on November 14 of that year, making it the only national mining museum with such federal recognition.

Underground Without Going Under

Step inside and the museum pulls you beneath the surface -- literally. A walk-through replica of an underground hardrock mine gives visitors the feel of the tunnels where fortunes were dug from Colorado rock. Elsewhere, an elaborate model railroad re-creates the transportation networks that hauled ore from mountainside to smelter. The Gold Rush room displays specimens of native gold, while a large mineral collection showcases the geological wealth extracted from American soil. A mining art gallery rounds out the experience, translating the industry's grit and grandeur into visual form. The museum occupies a building that once educated Leadville's children, and there is a fitting symmetry in its current mission: educating the public about the industry that built the town.

Presidents, Prospectors, and Rascals

The Hall of Fame's inductee criteria cast a deliberately wide net. Candidates must have made significant contributions to the American mining scene, and consideration extends to prospectors, miners, mining leaders, engineers, teachers, financiers, inventors, journalists, rascals, geologists, and others. The roster reads like an unlikely dinner party: Georgius Agricola, the sixteenth-century father of mineralogy; Herbert Hoover, who worked as a mining engineer before becoming the 31st President; Meyer Guggenheim, whose mining empire funded one of America's great philanthropic dynasties; Ed Schieffelin, who founded Tombstone, Arizona, after a silver strike; and Harrison Schmitt, the geologist-astronaut who walked on the Moon. Horace Tabor, Leadville's own silver king, naturally holds a place of honor.

The Missing Miners

Not everyone celebrates what the Hall of Fame chooses to remember -- or forget. Historian James Loewen, in his book Lies Across America, criticized the museum for overemphasizing scientists, executives, and owners of vast mining properties. He noted that only fourteen inductees -- roughly 12 percent of the total -- represented individual miners, prospectors, labor leaders, politicians, philanthropists, and all other categories combined. The people commemorated were predominantly white Anglo-Saxon Protestant men, Loewen observed, while historically mining has been one of America's most multicultural occupations. He also pointed to the absence of any memorial to the thousands who lost their lives in coal mines. The museum has since responded: in 2017, it opened "Buried Sunlight: Coal Mining in America," an exhibit exploring the social, labor, safety, and environmental dimensions of coal mining.

From the Air

The National Mining Hall of Fame sits at 39.251N, 106.294W in Leadville, Colorado, at approximately 10,152 feet elevation. The museum building is on the west side of town. From the air, look for Leadville's compact grid against the mountain backdrop. Nearest airport is Lake County Airport (KLXV) just south of Leadville. The Arkansas River valley provides the best approach corridor. High-altitude density altitude effects are significant at this elevation.