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

Amazonite is classed as a Tectosilicate and is part of the Feldspar group of minerals. Amazonite forms in a triclinic crystal structure and its chemical formula is K(AlSi3O8). In appearance, Amazonite can range from shades of green to green blue to blue, and often with white streaks or veining. The greenish colour is believed to come from the small amount of lead contained in its composition. Amazonite is named after the Amazon River due to its colour and similarities to another rock found along the riverbanks, although Amazonite is not actually found at or near the Amazon. Although less commonly used in jewellery today, Amazonite has been mined and used by humans for thousands of years and Amazonite jewellery from at least 2000BCE have been discovered in North Africa. Amazonite is found in many locations around the world including Brazil, Peru, Ethiopia, Canada, Russia, Mozambique, Myanmar, Pakistan, China, Madagascar, and the United States of America. This specimen most probably comes from the U.S.A., Amazonite is found in several US states particularly in Colorado, Virginia, Pennsylvania. This specimen is of both scientific and historic significance as a striking blue green example of Amazonite mined prior to 1868 in the United States of America, most likely from Colorado, Virginia, or Pennsylvania. These three states are all locations of significant Amazonite deposits. 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 Feldspar mineral specimen from the Tectosilicate class in shades of blue-green with white veining.Existing label: green/blue Feldspar / "amazonite" / possibly USA geological specimen, geology, geology collection, burke museum, beechworth, tectosilicate, amazonite, feldspar, triclinic crystal structure, amazonite usa, amazonite colorado, amazonite virginia, amazonite pennsylvania

This specimen was recovered from Ceres West of Geelong, Victoria. Greenstone is the name for any metamorphosed basic igneous rock (in the case of this specimen, Gabbro) that gains its greenish colour to the presence of the minerals chlorite, actinolite, or epidote, hence the term 'green' and 'stone'. Greenstone is often formed through metamorphsis along a convergent plate boundary. In the rock cycle (the series of processes that creates the various types of rocks) there are identified three different types of rocks, which are the sedimentary, the igneous and the metamorphic. Metamorphic rocks started out as sedimentary, igneous or earlier metamorphic rocks but changed from their original condition under the effect of high heat, high pressure or hot, mineral-rich fluid. However, if pressure or heat is too high, then the rock will melt, resulting in the formation of an igneous rock. The name used to describe these types of rocks reflects this specific inherent trait of change, since the word “metamorphic” derives from the Greek word “metamorphosis”, meaning “change of form or structure”. Metamorphic rocks form in the Earth`s crust but can be also found on the surface, due to elevation of the Earth`s surface. They are divided into two categories: the foliated metamorphic and the non-foliated metamorphic rocks. Gabbro is a highly useful mineral that is often polished to create cemetery markers and kitchen benches. It is notable for its qualities of durability, being able to withstand extreme elements and wear. Whilst not rare, Gabbro is of great utility and has been highly desirable for its qualities. 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.Greenstone is a solid hand-sized metamorphic mineral of a green colour. Greenstone is the name for any metamorphosed basic igneous rock (in the case of this specimen, Gabbro) that gains its greenish colour to the presence of the minerals chlorite, actinolite, or epidote, hence the term 'green' and 'stone'. Gabbro is a medium to coarse grained rocks that consist primarily of plagioclase feldspar and pyroxene. Greenstone is often formed through metamorphsis along a convergent plate boundary. Gabbro forms due to cooling and crystallization of magma underneath Earth's surface. Greenstone/Gabbro/from Ceres west/of Geelong. Has old Geological Survey label/and probably collected by/Richard Daintree in 1861/C.Willam 15/4/21/ Other label: 62 /greenstone, metamorphosed, igneous rock, gabbro, chlorite, actinolite, epidote, metamorphsis, rock cycle, various types of rocks, sedimentary, high heat, high pressure, mineral-rich fluid, metamorphosis, foliated metamorphic, non-foliated metamorphic, convergent plate boundary, greenish colour, minerals