Ilakaka sapphire mine, one of Earth's largest known alluvial sapphire deposits, Ilakaka, Ihorombe Region, Madagascar, Africa

Sapphire Pool, Biscuit Basin, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Ilakaka sapphire mines, Ilakaka, Fianarantsoa province, Ihorombe Region, Southern Madagascar, Africa

Aerial of Wulaia Bay, Tierra del Fuego, Chile, South America

The Sapphire Pool in the Norris Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Ilakaka sapphire mines, Ilakaka, Fianarantsoa province, Ihorombe Region, Southern Madagascar, Africa

Fishing boats at Snug Cove in the historic whaling town of Eden, Sapphire Coast, New South Wales, Australia, Pacific

Turquoise clear water of a hot spring, Sapphire Pool, Black Sand Basin and Biscuit Basin, Yellowstone National Park, Wyoming, USA, North America

Golden Gate Bridge, cruise ship Sapphire Princess, San Francisco, California, USA

Turquoise clear water of a hot spring, Sapphire Pool, Black Sand Basin and Biscuit Basin, Yellowstone National Park, Wyoming, USA, North America

Sapphire Pool, Yellowstone National Park, Wyoming, USA, North America

Sapphire Pool, geyser, Biscuit Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

Drainage area of the Sapphire Pool, geyser, coloured thermophilic bacteria, microorganisms, Biscuit Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

Sapphire Pool in Biscuit Basin, Yellowstone National Park, Wyoming.

Sapphire Pool in Biscuit Basin, Yellowstone National Park, Wyoming.