Image credits

All photos are from Wikimedia Commons and are public domain or Creative Commons licensed. Photos are illustrative and do not show the specific listed sites.

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  Amethyst geode Planalto MNHN Minéralogie n3.jpg by Marie-Lan Taÿ Pamart, CC BY 4.0. Resized and converted to WebP.

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  Quartz ("Herkimer Diamond") (near Herkimer, New York State, USA) 5.jpg by James St. John, CC BY 2.0. Resized and converted to WebP.

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  Gold panning student (53719323816).jpg by BLM Alaska, Public domain. Resized and converted to WebP.

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  Hydrothermal quartz crystal (Late Pennsylvanian to Permian; Coleman Quartz Mine, Arkansas, USA) 4.jpg by James St. John, CC BY 2.0. Resized and converted to WebP.

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  Gold nugget (placer gold) 1 (17001285916).jpg by James St. John, CC BY 2.0. Resized and converted to WebP.

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  Gold Pan.jpg by Nate Cull from Christchurch, New Zealand, CC BY 2.0. Resized and converted to WebP.

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  Tourmaline Pala Minéraux SU.jpg by Marie-Lan Taÿ Pamart, CC BY 4.0. Resized and converted to WebP.

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  Blue Lace Agate from Namibia (polished).jpg by I2Overcome, CC BY 4.0. Resized and converted to WebP.