Very good samples from the Ballarat School of Mines.Three geological Specimens, with some breakaways.rocks, geology, galena crystal form, browken hill

From the Ballarat School of Mines.Geological Specimenrocks, geology, galena crystal, broken hill

This specimen is from Broken Hill, NSW. Galena is a natural mineral form of lead sulphide and is often found associated with sphalerite, calcite, and fluorite. Galena is an important lead ore mineral, and, in some regions, it is also an important mineral associated with silver ore. Sphalerite is a sulphide mineral that is the main ore of zinc. Rhodonite is an uncommon mineral once used as an ore of manganese in India, however today the scarcity and fragility of the crystals mean it is primarily used as lapidary materials or mineral specimens. In 1883, Charles Rasp who was a boundary rider at the time, discovered what he thought were deposits of tin but were in fact samples of silver and lead. He and six others went on to set up the first mining company in Broken Hill (BHP). The ore body became the largest and richest of its kind in the world mining ore worth more than 42,000 pounds in its first year. Many of these specimens were sent to research and collecting organisations across Australia, including the Burke Museum, to educate and encourage further study. Galena contains lead and silver, Sphalerite contains zinc. This specimen is part of a larger collection of geological and mineral specimens collected from around Australia (and some parts of the world) and donated to the Burke Museum between 1868-1880. A large percentage of these specimens were collected in Victoria as part of the Geological Survey of Victoria that begun in 1852 (in response to the Gold Rush) to study and map the geology of Victoria. Collecting geological specimens was an important part of mapping and understanding the scientific makeup of the earth. Many of these specimens were sent to research and collecting organisations across Australia, including the Burke Museum, to educate and encourage further study.A hand-sized piece of Sphalerite and Galena with Rhodonite crystalsburke museum, beechworth, geological, geological specimen, galena, rhodonite, sphalerite, silver ore, manganese, lead sulphide, lead ore, zinc ore, lapidary, mineral specimen, broken hill, nsw

Galena occurs in a range of deposit contexts, often in metalliferous veins, such as Broken Hill, Australia; Coeur d’Alene, Idaho, United States.; Clausthal Zellerfeld, Germany; and Cornwall, England. Large deposits also replace limestone, dolomite, or occasionally organic matter, or have a contact-metamorphic origin. Galena is additionally found in cavities, brecciated (fractured) zones in limestone and chert, and in coal beds. This specimen was recovered from Broken Hill NSW and is 60% lead with 8-12 oz/silver to the ton.Galena or 'lead glance' is a grey lead sulfide and the chief ore mineral of lead. It forms isometric crystals in which the ionic lattice is similar to sodium chloride. Galena is brittle and easily weathers to secondary lead minerals, with the upper part of mineral deposits often containing cerussite, anglesite, and pyromorphite. It usually contains silver, which is mined along with its lead content. Other commercially important minerals that form in close association with galena are antimony, copper, and zinc. This specimen is part of a larger collection of geological and mineral specimens collected from around Australia (and some parts of the world) and donated to the Burke Museum between 1868-1880. A large percentage of these specimens were collected in Victoria as part of the Geological Survey of Victoria that begun in 1852 (in response to the Gold Rush) to study and map the geology of Victoria. Collecting geological specimens was an important part of mapping and understanding the scientific makeup of the earth. Many of these specimens were sent to research and collecting organisations across Australia, including the Burke Museum, to educate and encourage further study.A small-sized solid specimen containing one mineral with a sparkly silver metallic lustre exterior and pastel-grey interior.geological specimen, geology, geology collection, burke museum, beechworth, galena, lead sulphide, alfred selwyn, broken hill

Named in 1845 by Wilhelm Karl von Haidinger cerussite takes its name from the Latin cerussa, meaning 'white lead'. When viewed under certain lighting conditions cerussite gives of fire and rainbow-like colours (due to its high dispersion) and it is quite sought after by geological collectors for this very reason. Cerussite is usually found in the oxidised zone of lead ore deposits. It is a very common weathering product of galena and other lead ore minerals. It is a secondary mineral, meaning it forms as a result of the alteration of pre-existing minerals in the Earth’s crust. The presence of lead in cerussite makes it potentially toxic. Historically, it has been an important source of lead, which has numerous industrial applications, including in batteries, construction materials, and radiation shielding. Cerussite has a crystal structure that belongs to the orthorhombic crystal system. Its crystal structure is characterized by a three-dimensional arrangement of atoms in a repeating pattern. The crystal lattice of cerussite consists of interconnected lead (Pb) and carbonate (CO3) ions. This crystal structure is visible in the specimen. This specimen was found in Dundas (formerly Mount Dundas), a historical mining locality, mineral field and railway located on the western foothills of the West Coast Range in Western Tasmania. During the 1890s Dundas swelled in numbers however it is now lost in a temperate rainforest and its population is now 2. The present Dundas Extended mine, about 1.5 km east of Dundas is presently worked for specimen material.Faceted cerussite gems are considered rare and valuable, given the softness of the mineral. This item is not a faceted gem however its historical and scientific research potential give it significance; mined in an Australian township, this cerussite could shed light on the now lost history of Dundas and the mining that occurred there. Additionally, the uses of this mineral in historical industrial processes give it scientific significance. Such knowledge can add to understandings of the geographical and geological nature of Western Tasmania and allow for further study of Australian geological specimens. A small lead carbonite mineral with shades of cream, white and brown throughout, flaky shards of white at base. CERUSSITE / (lead carbonite) / Locality: Dundas, W. Tasmaniadundas, tasmania, cerussite, lead, orthorhombic, geology, minerals, mining

Garnet is a popular gemstone used in jewellery due to its hardness and durability. There are about 5 varieties of Garnet, which distinguish the colour of each stone. In Australia mostly Pyrope and Aimandine varieties are found; Pyrope, which is blood-red to black and Aimadine, which is brownish-red to black. Other varieties are rarely found in Australia. The garnets visible in this specimen are likely Pyrope. Galnea is the natural mineral form of lead sulphide and has had various uses throughout history; from makeup to car batteries. It was first mined in South Australia in 1841. Green feldspar is an amazonite mineral, a variety of the potassium feldspar called microcline. This particular mineral is considered uncommon. It has been used in jewellery throughout history. It is likely that this specimen was found in Broken Hill, NSW, presumed due to findings of specimens with similar combinations. Broken Hill is Australia’s longest-lived mining city. The city’s fortunes have come and gone against an extreme economic background of boom and bust which continues today.This geological specimen is a rarity, given that is formed of three distinct minerals and the richness of colour that remains visible in this item attests to the strength of each structure. As we cannot pinpoint exactly where this specimen was found further research can only strengthen what is known about mining within Australia. As such the item is significant due to its scientific rarity and its ability to represent three specimens in one. A solid palm-sized mineral that features shades of grey, red and green. garnet, galnea, green feldspar, minerals, mining, rare specimen