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Dolly Pot
A dolly pot, also known as a dolly, is a portable tool used for crushing small quantities of gold-bearing rock, by hand, in a process known as dollying. In principle, a dolly pot is somewhat like a large mortar and pestle, but is always made of metal and is intended specifically to crush hard rocks like quartz. It is typically flat at the bottom, rather than rounded as in a typical mortar. 19th-century versions were often made of cast iron. Modern dolly pots are typically fabricated from steel. The place of the pestle is taken by a long heavy steel rod, at one end provided with a stamping surface. The process of dollying is highly labour-intensive. It involves pulverising the rock, by hand, until the gold separates from the surrounding rock matrix. It typically is used only to test for the presence of gold in samples taken from a quartz reef. File:Reno, near Gundagai, NSW - Dollying gold-bearing quartz at Long Tunnel Mine (Australian Town & Country Journal, 29 March 1911 p20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mortar And Pestle
A mortar and pestle is a set of two simple tools used to prepare ingredients or substances by compression (physics), crushing and shear force, grinding them into a fine Paste (rheology), paste or powder in the kitchen, laboratory, and pharmacy. The ''mortar'' () is characteristically a bowl, typically made of hardwood, metal, ceramic, or hard stone such as granite. The ''pestle'' (, also ) is a blunt, club-shaped object. The substance to be ground, which may be wet or dry, is placed in the mortar where the pestle is pounded, pressed, or rotated into the substance until the desired texture is achieved. Mortars and pestles have been used in cooking since the Stone Age; today they are typically associated with the pharmacy profession due to their historical use in preparing medicines. They are used in chemistry settings for pulverizing small amounts of chemicals; in arts and cosmetics for pulverizing pigments, binders, and other substances; in ceramics for making Grog (clay), grog; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartz
Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The Atom, atoms are linked in a continuous framework of SiO4 silicon–oxygen Tetrahedral molecular geometry, tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of Silicon dioxide, SiO2. Quartz is, therefore, classified structurally as a Silicate mineral#Tectosilicates, framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation from α-quartz to β-quartz takes place abruptly at . Since the transformation is accompanied by a significant change in volume, it can easily induce microfracturing of ceramics or rocks passing through this temperature threshold. There are many different varieties of quartz, several of which are classifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cast Iron
Cast iron is a class of iron–carbon alloys with a carbon content of more than 2% and silicon content around 1–3%. Its usefulness derives from its relatively low melting temperature. The alloying elements determine the form in which its carbon appears: Cast iron#White cast iron, white cast iron has its carbon combined into an iron carbide named cementite, which is very hard, but brittle, as it allows cracks to pass straight through; Grey iron, grey cast iron has graphite flakes which deflect a passing crack and initiate countless new cracks as the material breaks, and Ductile iron, ductile cast iron has spherical graphite "nodules" which stop the crack from further progressing. Carbon (C), ranging from 1.8 to 4 wt%, and silicon (Si), 1–3 wt%, are the main alloying elements of cast iron. Iron alloys with lower carbon content are known as steel. Cast iron tends to be brittle, except for malleable iron, malleable cast irons. With its relatively low melting point, g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartz Reef Mining
Quartz reef mining is a type of gold mining in "reefs" ( veins) of quartz. Quartz is one of the most common minerals in the Earth's crust, and most quartz veins do not carry gold, but those that have gold are avidly hunted by prospectors. In the shallow, oxidized zones of quartz reef deposits, the gold occurs in its metallic state, and is easily recovered with simple equipment. Quartz reef mining played an important role in 19th century gold-mining districts such as Bendigo, Victoria in Australia, Central Otago in New Zealand, and the California mother lode. Mining Mining the ore usually required mine shafts sunk to mine quartz from the reefs, sometimes deep underground. Horizontal tunnels called drifts were dug out from the shaft at different levels to find the gold-bearing rock. All the ore was hoisted to the surface for processing. Water had to be removed by pumping. Big hoisting engines were installed to hoist lifts and buckets up the shafts. On the surface above the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reno, New South Wales
Reno is a rural locality in the Cootamundra–Gundagai Regional Council local government area of the Riverina region, of New South Wales, Australia. There was once a gold mining village of the same name. For many years, until at least 2016, the locality was known as Jones Creek. Its population at the 2021 census was 131. Location Reno is located immediately to the north-west of Gundagai. The locality consists of parts of the valleys of two creeks, Jones Creek and Back Station Creek, both right-bank tributaries of the Murrumbidgee River, and the three ranges of hills that border the two creek valleys. The area now known as Reno lies within the traditional land of Wiradjuri people. Name The locality of Reno takes its name from the former mining village. In turn, the mining village was named after the city of Reno, Nevada, the early growth of which was boosted by being the rail junction for Virginia City and vast silver and gold deposits of the Comstock Lode. The former n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Town And Country Journal
''Australian Town and Country Journal'' was a weekly English language broadsheet newspaper published in Sydney, New South Wales, from 1870 to 1919. The paper was founded by Samuel Bennett with his intention for it to be "valuable to everybody for its great amount of useful and reliable information". The paper was known for its range of topics, dealing with domestic and foreign news as well as featuring essays on literature, science and invention. History The first issue of the ''Australian Town and Country Journal'' was published on 8 January 1870. The ''Journal'' ran until 25 June 1919. After 2 June 1878, when Samuel Bennett died, publication of the paper was taken over by his sons, Frank and Christopher. Digitisation The paper has been digitised as part of the Australian Newspapers Digitisation Program project of the National Library of Australia. See also *List of newspapers in Australia *List of newspapers in New South Wales This is a list of newspapers in New South ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Territory
The Northern Territory (abbreviated as NT; known formally as the Northern Territory of Australia and informally as the Territory) is an states and territories of Australia, Australian internal territory in the central and central-northern regions of Australia. The Northern Territory shares its borders with Western Australia to the west (129th meridian east), South Australia to the south (26th parallel south), and Queensland to the east (138th meridian east). To the north, the Northern Territory looks out to the Timor Sea, the Arafura Sea, and the Gulf of Carpentaria, including Western New Guinea and various other islands of the Indonesian archipelago. The NT covers , making it the third-largest Australian federal division, and List of country subdivisions by area, the 11th-largest country subdivision in the world. It is sparsely populated, with a population of only 249,000 – fewer than half the population of Tasmania. The largest population centre is the capital city of Darw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold Prospecting
Gold prospecting is the act of searching for new gold deposits. Methods used vary with the type of deposit sought and the resources of the prospector. Although traditionally a commercial activity, in some developed countries Placer mining, placer gold prospecting has also become a popular outdoor recreation. Gold prospecting has been popular since antiquity. From the earliest textual and archaeological references, gold prospecting was a common thread for gaining wealth. Prospecting for placer gold Prospecting for placer gold is normally done with a Gold panning, gold pan or similar instrument to wash free gold particles from loose surface sediment. The use of gold pans is centuries old, but is still common among prospectors and miners with little financial backing. Deeper placer deposits may be sampled by trenching or drilling. Geophysical methods such as seismic exploration, seismic, gravity or magnetics may be used to locate buried river channels that are likely locatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metallic Objects
Metallic may be a reference to: *Metal *Metalloid, metal-like substance *Metallic bonding, type of chemical bonding *Metallicity, in astronomy the proportion of elements other than helium and hydrogen in an object *Metallic color, a color that gives the appearance of metal *Metallic dragon, a classification of dragon found in the role playing game Dungeons & Dragons *Metallic paint, paint that provides the appearance of metal *Heavy metal music Heavy metal (or simply metal) is a Music genre, genre of rock music that developed in the late 1960s and early 1970s, largely in the United Kingdom and United States. With roots in blues rock, psychedelic rock and acid rock, heavy metal band ..., a genre of rock music See also * Metallica (other) * Metal (other) * {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
