In Australia, precious opal is found in Cretaceous age sandstones and mudstones. These sedimentary rocks were deeply weathered and this weathering released silica into the groundwater.Australia is the only part of the world where opalised animal and plant fossils have been found. Opal artefacts several thousands of years old have been discovered in East Africa. As early as 250 BC the Romans prized opals, thought to have come from mines in Eastern Europe, the ancient world's main source of opals. There are many aboriginal dreamtime stories that feature opal. Australian opals discovered during the late 1800's found little favour with European markets but their commercial value increased in the 1900's and in 1932 Australia took over as the major producer of opals in the world and remains the largest producer to this day. Opal is found around the world (Brazil, Mexico, Honduras and the western US) however Australia produces 95% of the world's precious opal and it is our official national gemstone. Opal was first mined commercially at Listowel Downs in Queensland in 1875 and later at White Cliffs in NSW. Today, Coober Pedy (SA) is the main producer of white opal, though in recent years this field has expanded and all types of opals are found. Other centres in SA include Andamooka and Mintabe. Lightning Ridge (NSW) is renowned for black opal and formerly White Cliffs was a large producer of high quality opal. Boulder opals (opals in concretionary ironstone) are mined in Queensland from numerous localities in a zone extending from the Eulo and Cunnamulla district in the south and northwest for a distance of over 700 km to Kynuna in the north. The towns of Quilpie, Yowah and Winton are the main opal mining and wholesale centres. Opals are considered gemstones and have been used in jewellery for thousands of years.Throughout much of history, opals were actually believed to be good luck. The Romans thought that opals were one of the luckiest gemstones and a symbol of hope. In the Middle Ages, opals were believed to be bestowed with all the positive properties of coloured gemstones due to its rainbow-like play of colour. Finally, there is a superstition that you should not wear an opal unless it is your birthstone otherwise misfortune will befall you. This, of course, is far-fetched, but the notion could have been promoted in the late 19th and early 20th Centuries by diamond traders who were trying to increase sales of diamonds and deter people from buying opals. Possibly related to this is the thought that you should set opal jewellery with diamonds as their powers of good fortune will override any negativity held by the opal. The great majority of opal does not show play of colour and is called common opal or potch however this is not the case with a precious opal. Opal is a precious gemstone, like rubies, emeralds or diamonds. Opal is rare, and it is expensive to prospect and mine for.Silica is one of the most common minerals on the planet, but precious opal is very rare – far more rare than diamonds. Precious opal is rare because the natural processes that create it rarely occur.Most (at least 95%) of the opal found by miners is common opal without gem colour. In Australia we call it potch. It can be white, grey, black or amber coloured. Even when a miner finds gem-coloured opal, most of it can’t be cut into gemstones because it’s too thin, or sandy. 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.It is not known where this opal originated, except that it is probably from Victoria, as it has been recorded from many localities in the State. Common Opal is formed from silica-rich water circulating through rocks near the Earth’s surface. It consists of minute spheres of silica arranged in different ways. In common opal, the spheres are of different sizes and randomly arranged, unlike in precious opal where the spheres are of similar size and uniformly arranged in three dimensions. These differences account for common opal generally being translucent to opaque and without the play of colours, or opalescence, displayed by precious opal. Common opal is found in many localities and different geological environments throughout Australia and the world. Precious opal requires special conditions to form and is much less common. Australia produces most to the world’s precious opal. burke museum, beechworth, indigo shire, beechworth museum, geological, geological specimen, precious opal, opal, brazil, mexico, honduras, queensland, coober pedy, gemstones, jewellery, play-of-colour, light blue

Common Opal is a mineraloid that is non crystallising and is classed as an amorphous silicate, the chemical composition for Opal is SiO2 nH2O. Opals can develop in weathered sedimentary rock typical in arid regions where limited water enters small gaps in the rock, and the silicate is hydrated. Common opals, unlike precious opals, do not exhibit ‘play of colour’ in which the colour appears to change depending on the angle of view. While precious opals are highly valuable and cut as gemstones for jewellery, common opals can be cut into inexpensive gemstones and are also mined for various uses including as ingredients in ceramics, insulation, fillers, and abrasives. The source of this common opal specimen is unknown, but common opals are found around the world, notable deposits are found in Queensland, South Australia, New South Wales, Peru, Kenya, Nevada, Oregon, and Mexico. This common opal specimen is of historic and scientific significance due to its donation in 1868 as part of the Geological Survey of Victoria and as a typical example of uncut common opal. 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 palm-sized amorphous (non-crystallising) hydrated silicate mineraloid specimen in shades of brown, orange, and white.Existing label: Common Opal / Locality unknowngeological specimen, geology, geology collection, burke museum, beechworth, common opal, opal, mineraloid, amorphous silicates, hydrated silicate

It is not known where this opal originated. Common Opal is formed from silica-rich water entering the earths crust and hardening into a gel of water and silica-spheres, layered through the specimen. Common opal differs from precious opal in colouration and appearance, with precious opal including more colours, and having a translucent or glossy appearance, where common opal shows less colour and is typically opaque. It scores high on the Mohs hardness scale, and is common throughout the world, especially in Australia, where it is far more prevalent than the highly-prized precious opal. Australia is also the highest producer of opals in the modern world. 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 solid, silica-based mineral specimen of Common Opal in shades of grey, green, and yellow, with a thick grey vein running through the centre. geological specimen, geology, geology collection, burke museum, beechworth, opal, common opal, gemstone, mining

EULO Famous for it's Opalseulo, queensland

Vegemite hit the market in 1923 but failed to sell. In 1928 the company renamed its spread Parwill to compete against the top-selling British import, Marmite but Parwill flopped too. In 1922 the Fred Walker Company hired a chemist, Percy Callister, to develop a useful food from vitamin-rich used yeast being dumped by breweries. Using enzymes to split open the yeast cells, Callister extracted the contents and blended them with vegetables and salt into a sticky black paste with a sharp taste. They tried the Vegemite name again and gave the product away with Walker cheese products and a couple of cars as prizes before Australians finally fell for it. In 1939 Vegemite was officially endorsed by the British Medical Association as a good source of Vitamin B and was included in Australian Army rations during World War II. Buyers were now assured of the nutritional value of Vegemite, which has been a market leader ever since. The Fred Walker Company became the Kraft Walker Cheese Co. Pty Ltd in 1926 and Kraft Foods Limited in 1950. (from Powerhouse Museum) This type of jar was used to package Vegemite between 1935 and 1945. Vegemite has been an 'Australian icon' since World War II when it was recognised as one of the world's highest food sources of vitamin B. It was sent to war with the troops and rationed at home. The marketing strategy that put Vegemite in 9 out of every 10 Australian homes in the 1940s, 50s and 60s emphasised the value of Vegemite to children's health. A cylindrical Vegemite jar made of white opal glass. It has a threaded rim and two mould seams. On the base - AGM Vegemite V879

"EULO QUEEN" Hotel Qld. HEART OF THE OPAL FIELDS Sunshine State QUEENSLANDeulo, queensland

While the date of when this box was made is unknown, there is an inscription on the lid that indicated that the item was owned by a J. E. Huderric in 1767. A snuffbox is a small decorative box used to store scented tobacco powder and were commonly used by men and women in the 17th and 18th century.The social history objects held in the Burke Museum's collection help to tell the stories of Beechworth's past by showing the social, cultural, and economic aspects of the town's history.A decorated small black box. It is rectangular and opens up with a lid. The lid is decorated on the outside corners and a centre diamond shape using opal coloured flaked gems.J. E. Huderric 1767/ [inscribed on the lid] A01197/box, drugs, tobacco, 18th century

There are 17 opal fields in Australia. This opal bearing stone was found in Lightning Ridge, NSW over what is known as the Great Australian Basin. This basin was formed and covers an area of 1.7 million square kilometers in eastern Australia in the Cretaceous period. This basin used to contain an inland sea, which provided an environment where silcrete eventually formed when water levels changed. This eventually seeped into other structures, and eventually hardened and formed opal. Lightning Ridge has a population of around 2000 people, with about 80 000 visitors every year. It is a historic mining town, and is known for its deposits of a rare black opal. Mining started in the area in the late 1800s, early 1900s when the black opal was discovered. This opal-bearing stone is of social and historical significance. It is from Lightning Ridge, which is well-known for being a large producer of opal stones, most famously black opal. The history of the period dates back to 140 million years, with the discovery of black opal in the early 1900s causing interest in the area. 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 palm-sized solid mineral specimen in shades of beige and light orange*** silica based? burke museum, beechworth, geological, geological specimen, opal, opal fields, australia, lightning ridge, new south wales, great australian basin, cretaceous, silcrete, black opal, mining

L-R: Peter Bassett-Smith, Opal SmithColour photographactivities, 30th anniversary, eltham district historical society, peter bassett-smith, opal smith

Keith Raw, Opal Chief champion 2yo 1960s,AlipesPrimary historicalPink, Purple sleevesbendigo, bhrc, opalchief, alipes, trotting, pacing, race colours, keith raw, ke raw, k raw

Compilation of historical facts and events about Coober Pedy, opal mining and the people who live there.44 p., colour and black & white illustrationscoober pedy, opal mining

One of original religious artefacts used in the Loreto Chapel. Although no maker's mark, opals would indicated Australian made.Gold coloured monstrance. (Receptacle in which the Holy Eucharist was kept as well as placed for public adoration.) At the top is a large round structure, rayed like the sun - 'viril' and inside the viril is a glass section for holding the host - 'vidriera'. Highly decorated and surrounded by gem stones and opals.

L-R: - , Mrs Marion Yeoman, Mrs Opal Smith (Treasurer and Membership Secretary, Shire of Eltham Historical Society)Colour photograph1987, activities, senior citizens' centre

Autumn Excursion to Petty's Orchard, Pontville and Schramm's Cottage led by Irvine Green (1913-1997); 6 April 1997. L-R: Opal Smith, Sue Law.Colour photographactivities, petty's orchard, irvine green, opal smith, sue law

It is a portrait of a man believed to be related to George Evans. A framed copy of an opal type photograph of a gentleman believed to be related to George Evans. The outer frame is made up of brown stained timber with a gold surround in the middle and a red velvet inner surround. It is a head and shoulders photograph of a white haired and bearded man dressed in a dark suit and bow tie of the mid-Victorian era.george evans collection

Autumn Excursion to Petty's Orchard, Pontville and Schramm's Cottage led by Irvine Green (1913-1997); 6 April 1997. L-R: Opal Smith, Bob Francis, Blanche Shallard, Irvine Green.Colour photographactivities, petty's orchard, irvine green, blanche shallard, bob francis, opal smith

This unusual jewellery set belonged to the family of Mrs. Jean Raper of Wodonga. It is part of an extensive collection of jewellery items which belonged to her mother and grandmother.This item is from the Raper Collection donated to the Wodonga Historical Society by Mrs. Jean Raper.A long strand of black beads with embedded opal chips of varied sizes. The front central bead is teardrop shaped and surrounded by 4 large round beads. Beads are strung on a strong dark thread with a plastic screw clasp. The set includes a matching brooch consisting of 3 medium sized and 4 smaller beads attached to a faun gold bar.fashion accessory, women's jewellery

Contents: • Next meeting, Celebrating Peter Bassett-Smith • February Meeting – Celebrating Peter Bassett-Smith • Jock Read 1915-2010 • Opal Smith 1914-2010 • 2011 Program • Other News • Annual General Meeting The Shire of Eltham Historical Society was formed in October 1967. The first newsletter of the Society was issued May 1978 and has been published continuously ever since on a bi-monthly basis. With the cessation of the Shire of Eltham in late 1994, the Society's name was revised to Eltham District Historical Society and this name first appeared with issue No. 103, July 1995. The collection of the Society's newsletters provides a valuable resource on the history of the Society's activities, office bearers and committee members, guest speakers and subjects of historical interest pertinent to the former Shire of Eltham and the Eltham District.A4 photocopied newsletter distributed to membersnewsletter, eltham district historical society, shire of eltham historical society

Photo album organised by and dedication note signed by Montmorency-affiliated members Blanche and Jack Shallard, Opal Smith, Marjorie North and Sue Law. The album contains a number of images recorded under accession numbers 01819, 01820, 01828, 01829. Album consists of 30 photos mainly of Montmorency environs with an explanatory card, title cards and pressed flowers. Plastic construction with 16 leaves capable of holding three 10 x 15 cm photos per side in plastic pockets. 02076, montmorency (france) photo album

Back Row L-R: Marion Yeoman, Lois Loftus-Hills, Doug Orford, Jo McCormick, Peter Bassett-Smith, Helen Harbeck, John Graves Front Row L-R: Blanche Shallard, Leslie Martin, Opal Smith, Mary Ryan, Joy Ness, Gwen BakerOpening ceremony of the new home of Eltham District Historical Society Colour photographeltham, main road, police residence, local history centre, eltham district historical society, opening day, peter bassett-smith, marion yeoman, lois loftus hills, doug orford, jo mccormick, helen harbeck, john graves, blanche shallard, leslie martin, opal smith, mary ryan, joy ness, gwen baker

According to the 1912 Department of Mines Bulletin of the Geological Survey of Victoria, basalt covers a considerable portion of the Macedon area including Mount Macedon. Basalt is the most common form of rock underlying the earth's surface and is found in three kinds of rock forming environments: ocean divergent boundaries, oceanic hotspots, and mantle plumes and hotspots beneath continents.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 solid mass, geological specimen in shades of grey and white. Hyalite is a colourless variety of opal. It occurs as globular and botryoidal masses and irregular crusts in volcanic and pegmatite environments where the silica deposits from the gas phase. Basalt is dark in colour, fine-grained igneous rock composed of plagioclase and pyroxene minerals. It is commonly formed as an extrusive rock, such as lava flow. It is one of the most common forms of rock underlying the earth's surface.burke museum, geological specimen, department of mines, geological survey of victoria, basalt, mount macedon, beechworth

This book was presented to Professor Ferdinand Krause of the Ballarat School of Mines by the co-author Felix Ratte who had taught Geology at the Ballarat School of Mines. Felix Ratte became mineralogist to the Australian Museum, Sydney.Hardcovered book with brown cloth cover. 341 pages with illustrations. Chapters in the book include Geology; Rocks and their Movements; Stratified Deposits; Mineral Veins and Lodes; Dynamics of Lodes; Filling of Lodes; Irregular Deposits; Alluvial Deposits; Physical Properties of Minerals; Compsition and Determination of Minerals; Noble Mineral; Silver and Lead; Quicksilver or Mercury; Haloids and salts; Quartz and Opal; Precious stones; assays and the use of Blowpipes; Special Assays for Gold and SilverFrontise page handwritten in ink: 'Prof. Krause from F. Ratte'mining, ballarat school of mines, geology, felix ratte, minerals, ferdinand krause

Letters and historical research information re Johann Menge (1788-1852). Includes three letters to A Richardson from Val Menge (wife of possible descendant of Johann Menge) , dated December 19970, Feb 1971 and March 1971; Extract from ''South Australia and its Mines''(1846); Extract from ''Historical studies of Australia & New Zealand Vol 10''; Extract from the ''Australian Dictionary of Biography''; extract from George Stevenson's Journal in ''Royal Geographic Society of Australia - South Australian Branch, Vol 30, p. 62; Extract from ''The history of South Australia pp. 186-187; Extract from letter written by ''The South Australian Register'' (1852); Extract from '' Tasmanian Historical Research Association'' Papers and proceedings Vol 11, No. 2, pp 31 - 46; copy of book review (unknown paper) of ''Opal Men'', with sketch of Johann Menge, who first discovered opal in Australia. Menge was a mineralogist/geologist with a talent for languages - ''eccentric'' -died in poverty at Forest Creek, 1852.Val & Ted Mengeperson, individual, johann menge