Sapphire and ruby crystals can grow to large sizes (crystals have been found weighing more than a kilogram). The impurities in corundum gems produce the large range of colours found. Gems generally get their colour because of certain metals or impurities contained in the mineral. They have the same chemical composition and structure. Sapphires and rubies are both gem varieties of the mineral corundum. Each of these 41 brilliant cut gems is about 3 mm in diameter. Geoscience Australia provides information and advice towards the management of Australia's groundwater and surface water resources.Ĭolour range of Australian sapphires. Information regarding mineral and minerals exploration in Australia at national and regional scale, mining and land use, sustainable development of resources, and levels of exploration activity Positioning and navigation Information regarding Australia's coasts and estuaries, seabed mapping and Antarctica. Our natural hazard capability forms part of the backbone behind the most important decisions made by governments, emergency services, and the industry sector.

Location information about Australia's dimensions, landforms and national mapping.

Petroleum resources, coal resources, uranium and thorium resources, geothermal energy, renewable energy resources, basin geology, Acreage Release.

Ruby sapphire meaning