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Adamite (zinc arsenate). Ojuela Mine, Durango, Mexico. Photo ID: rmi20071108_081 Digital photo © Rune Midtgaard 2007 Home

Agate, cut and polished. Agate Ck., Forsayth, Queensland, Australia. Photo ID: rmi20071108_030 Digital photo © Rune Midtgaard 2007 Home

Agate, cut and polished. Agate Ck., Forsayth, Queensland, Australia. Photo ID: rmi20071108_032 Digital photo © Rune Midtgaard 2007 Home

Agate, cut and polished. Agate Ck., Forsayth, Queensland, Australia. Photo ID: rmi20071108_033 Digital photo © Rune Midtgaard 2007 Home

Azurite with malachite (copper carbonate). Bisbee, Arizona, USA. Photo ID: rmi20071108_084 Digital photo © Rune Midtgaard 2007 Home

Azurite with malachite (copper carbonate). Bisbee, Arizona, USA. Photo ID: rmi20071108_085 Digital photo © Rune Midtgaard 2007 Home

Chrysocolla (copper silicate). Replacing azurite and malachite. Dorothy Mine, Mungana, Queensland, Australia. Photo ID: rmi20071108_042 Digital photo © Rune Midtgaard 2007 Home

Corundum (ruby) (aluminium oxide in zoisite). Longido Mine, Namanga, Tanzania. Photo ID: rmi20071108_060 Digital photo © Rune Midtgaard 2007 Home

Corundum (ruby) (aluminium oxide in zoisite). Longido Mine, Namanga, Tanzania. Photo ID: rmi20071108_061 Digital photo © Rune Midtgaard 2007 Home

Crocoite. Adelaide Mine, Dundas, Tasmania, Australia. Photo ID: rmi20071108_034 Digital photo © Rune Midtgaard 2007 Home

Cyanotrichite (copper aluminium sulphate). Gleeson, Arizona, USA. Photo ID: rmi20071108_083 Digital photo © Rune Midtgaard 2007 Home

Dioptase (copper silicate on calcite). Photo ID: rmi20071108_082 Digital photo © Rune Midtgaard 2007 Home

Dioptase on calcite copper silicate. Tsumeb, Namibia. Photo ID: rmi20071108_092 Digital photo © Rune Midtgaard 2007 Home

Dundasite (lead aluminium carbonite). Dundas, Tasmania, Australia. Photo ID: rmi20071108_037 Digital photo © Rune Midtgaard 2007 Home

Erythrite. Mt. Elliot, Cloncurry, Queensland, Australia. Photo ID: rmi20071108_046 Digital photo © Rune Midtgaard 2007 Home

Gypsym "rose". Africa. Photo ID: rmi20071108_048 Digital photo © Rune Midtgaard 2007 Home

Limonite. Photo ID: rmi20071108_052 Digital photo © Rune Midtgaard 2007 Home

Malachite (copper carbonate). Cobar, New South Wales, Australia. Photo ID: rmi20071108_039 Digital photo © Rune Midtgaard 2007 Home

Malachite. Browns Prospect, Rum Jungle, Northern Territory, Australia. Photo ID: rmi20071108_078 Digital photo © Rune Midtgaard 2007 Home

Precious opal. White Cliffs, New South Wales, Australia. Photo ID: rmi20071108_095 Digital photo © Rune Midtgaard 2007 Home

Pyrite (iron sulphide). Huanzala, Peru. Photo ID: rmi20071108_064 Digital photo © Rune Midtgaard 2007 Home

Rhodonite with calcite manganese silicate. Franklin, New Jersey, USA. Photo ID: rmi20071108_054 Digital photo © Rune Midtgaard 2007 Home

Rhodonite with calcite manganese silicate. Franklin, New Jersey, USA. Photo ID: rmi20071108_055 Digital photo © Rune Midtgaard 2007 Home

"Sand gypsum". Africa. Photo ID: rmi20071108_057 Digital photo © Rune Midtgaard 2007 Home

"Sand gypsum". Africa. Photo ID: rmi20071108_058 Digital photo © Rune Midtgaard 2007 Home

Scholzite (calcium zinc phosphate). Reaphook Hill, Flinders Ranges, South Australia. Photo ID: rmi20071108_044 Digital photo © Rune Midtgaard 2007 Home

Septarian concretion. Winton, Queensland, Australia. Photo ID: rmi20071108_050 Digital photo © Rune Midtgaard 2007 Home

Smithsonite (zinc carbonate). Sinaloa, Mexico. Photo ID: rmi20071108_086 Digital photo © Rune Midtgaard 2007 Home

Torbernite (copper uranium phosphate). Shinkalobwe, Congo (ex-Zaire). Photo ID: rmi20071108_088 Digital photo © Rune Midtgaard 2007 Home