Gold nuggets are created in nature as a result of the surface weathering processes on high-grade gold bearing quartz veins, or rarely other types of geologic gold deposits.
Frequently the sources of these deposits, known as placers, are unknown, probably totally eroded, or deeply buried. Most gold deposits do not form placers when they erode through time because the gold doesn't occur in large enough particles to survive the mechanical wear and tear of the weathering cycle. Therefore, gold nuggets are relatively rare. In addition, most of the gold nuggets that were found during the times of the American West gold rush days have been melted down and their gold exists today as gold bullion, gold coins, or as jewelry. This is especially true of larger nuggets, in the 1/4 ounce and larger sizes. This is the reason these nuggets are priced at more than their metal values.
Another noteworthy fact about gold nuggets is their fineness, or actual pure gold content. Most of the gold found in the American West is alloyed with silver, and rarely copper. This means that nuggets are frequently composed of mixtures of gold and silver with mostly 75% to 85% gold and 15% to 25% silver. This is usually expressed as 750 to 850 fine. The higher content of silver in gold nuggets, the paler the color. To find the true gold content or fineness of any gold specimen requires a special fire assay determination. More than 20% silver content is technically named Electrum. Some countries such as Australia tend to have higher fineness gold nuggets.
Rarely, gold nuggets will be found in their crystal form, which is Isometric. This will frequently be expressed as cubes, octohedrons, or trigonal shapes. These nuggets surely would not have traveled far from their parent source.
All of the gold nuggets available from NorthernNevadaGold.com have been found using a metal detector.
All gold nuggets shown are mounted in a 1" x 1" Thumbnail "Perky-Box" . All have labels on the bottom of box, and inside box, giving Name, Location, and weights.
Specimen gold is generally found and retrieved from lode gold deposits. These are usually high-grade occurences found in quartz veins, or less commonly calcite. Gold may also be found as specimens in, or with iron oxides, adularia (a low-temperature feldspar), sulfides, and with other silica-rich minerals such as tourmaline, amythest, or clay minerals.
Gold crystallizes in the isometric system. Many of the most common isometric crystal shapes such as cubes, octahedrons (pyramid-like), are very uncommon. Natural gold crystals tend to be distorted, thus it typically forms skeletal crystals, sheets, leafs, wires, and dendritic forms. Very rarely a trigon is found on the surfaces of leaf gold. This triangle appears as though stamped or engraved on the leaf gold surfaces.
The greatest number of gold specimens exhibit a "crystalline" form. This irregular gold specimen display is the result of using Hydrofluoric Acid to dissolve away the quartz matrix from the gold. This will leave a delicate gold specimen that illustrates the complex crystallization forms that the gold assumed as it formed.
All of the gold forms discussed above are available from NorthernNevadaGold.com, either in current or future offerings.
All gold specimens shown are mounted in either a 1" x 1" Thumbnail "Perky-Box" or a 2" x 2" Miniature "Perky-Box". All have labels on the bottom of box, and inside box, giving Name, Location, and weights.
I recently blundered into a unique opportunity: authentic antique Pumpkinseed whisky flasks. These date from the mid 1880s to around 1910. They were found in Austin, Nevada. They are starting to turn purple and will turn deeper if left in direct sunshine. They turn purple because in the day, glass makers added Potassium Permanganate to the melt to scavenge iron and clarify the glass. Ultra Violate sun rays turn the glass purple over time and exposure. These are in wonderful condition, no dings or scratches, only some faint ground hazing and some rainbow pearlized irridescence on some. I am offering these for $15.00 plus $5.00 shipping.
Curious!!! Crystallized Gold specimen from the Rochester Mining District. Gold shows brilliant luster, and a buttery-yellow color. Exhibits moderate octahedral crystal growth along a dendritic format. Devoid of any matrix. Found in an old, historic, Gold camp. Weighs .02 oz.
For more than a decade, Northern Nevada Gold has sold world-class mineral specimens and nuggets online. Early on, we found most of our wares using metal detectors at historic Nevada mines and mining camps. Today, we also resell items purchased from around the world. We appreciate your interest, and hope you enjoy viewing and purchasing from our extensive collections of world-class products!
We are always interested in purchasing quality Gold Specimens and Nuggets. Use the firstname.lastname@example.org address to reach us.