746-90376 - Borlotti beans are a legume rich in calcium and potassium.

1350-496 - Man processing milk fresh from a cow on a dairy farm

252-3078 - Tufas (calcium carbonate), Mono Lake, Tufa State Reserve, California, USA, North America

252-3076 - Tufas of calcium carbonate surround lake in Mono Lake Tufa State Reserve, with snow capped mountains in the background, in California, United States of America, North America

252-3079 - Tufas of calcium carbonate at lake in Mono Lake Tufa State Reserve, with mountains in the background, in California, United States of America, North America

252-3049 - Tufas of calcium carbonate, Mono Lake State Reserve, California, USA

252-3050 - Tufas of calcium carbonate, Mono Lake State Reserve, California, USA

252-10414 - Calcium carbonate tufas, Mono Lake, California, USA, North America

1178-28698 - Oats and oat milk against wood

746-89392 - Mammoth Hot Springs with bare tree trunk in Yellowstone National Park, Wyoming.

1116-46586 - The Guildhall, Bath, Somerset, England

1116-46034 - Hot Springs And Travertines, Terraces Of Carbonate Minerals Left By The Flowing Water, Pamukkale, Turkey

1116-46033 - Hot Springs And Travertines, Terraces Of Carbonate Minerals Left By The Flowing Water, Pamukkale, Turkey

1116-46035 - Hot Springs And Travertines, Terraces Of Carbonate Minerals Left By The Flowing Water, Pamukkale, Turkey

1116-46032 - Hot Springs And Travertines, Terraces Of Carbonate Minerals Left By The Flowing Water, Pamukkale, Turkey

1116-42770 - Agriculture

1116-39959 - This red encrusting sponge (Clathria sp.) is the most common of this family found in Hawaii. Here it has covered the calcium carbonate-producing seaweed, Halimeda kanaloana, Hawaii, United States of America

450-4029 - Settlement under calcium carbonate mine at Barz, near Abyaneh, Iran, Middle East

857-92917 - The Trona Pinnacles are pictured on a hot summer day in Trona, Calif., on June 7, 2015. The unique formations, known as tufa towers, are primarily made of calcium carbonate and were formed when the springs interacted with the water in what was once Searles Lake.

832-372774 - Pamukkale travetine terrace, white calcium carbonate rock formations, Turkey

832-372778 - Pamukkale travetine terrace, white calcium carbonate rock formations, Turkey

832-372779 - Pamukkale travetine terrace, white calcium carbonate rock formations, at sunset, Turkey

1161-935 - Drought in Burkina Faso (formerly Upper Volta). A white Land Rover 4-wheel drive vehicle drives past a dried out carcass.

1161-717 - Drought scene - two men walking past the dried out carcasses of dead cattle in Burkina Faso (formerly Upper Volta)

1161-932 - Locals on bicycles ride past carcasses of the bones of dead animals in the drought areas of Burkina Faso (formerly Upper Volta)

1161-609 - Ccarcasses of the bones of dead animals in the drought areas of Burkina Faso (formerly Upper Volta)

911-8000 - Mussel shells on Portnalong beach, Isle of skye, Scotland, United Kingdom, Europe

911-596 - Margarine for sale on supermarket shelves, Cumbria, England, United Kingdom, Europe

911-2121 - Cockle shells at Hest Bank, Morecambe Bay, Lancashire, England, United Kingdom, Europe

911-2120 - Cockle shells at Hest Bank, Morecambe Bay, Lancashire, England, United Kingdom, Europe

911-3382 - A border collie dog chewing a bone

698-2813 - Tufa spires and tower formations of calcium carbonate, Mono Lake, South Tufa Reserve, Mono Basin Scenic Area, Lee Vining, Inyo National Forest Scenic Area, California, United States of America, North America

698-2812 - Tufa spires and tower formations of calcium carbonate at sunset, Mono Lake, South Tufa Reserve, Mono Basin Scenic Area, Lee Vining, Inyo National Forest Scenic Area, California, United States of America, North America

698-2804 - Tufa spires and tower formations of calcium carbonate at sunset, Mono Lake, South Tufa Reserve, Mono Basin Scenic Area, Lee Vining, Inyo National Forest Scenic Area, California, United States of America, North America

698-2805 - Tufa spires and tower formations of calcium carbonate at sunset, Mono Lake, South Tufa Reserve, Mono Basin Scenic Area, Lee Vining, Inyo National Forest Scenic Area, California, United States of America, North America

817-275314 - Green canals of liquid Calcium Chloride drying in the desert outside Amboy, CA

816-2504 - Wind-eroded sculptures of calcium rich rock, The White Desert near Bahariya, Egypt, North Africa, Africa

816-2505 - Wind-eroded sculptures of calcium rich rock in The White Desert near Bahariya, Egypt, North Africa, Africa

817-190738 - Sliced Boiled Hens White Eggs

817-169889 - Calcium travertines, Pamukkale, Turkey.

817-169898 - Calcium travertines, Pamukkale, Turkey.

83-12347 - Stromatolites, one of the most ancient life forms on earth, mats of micro-organisms that become rock-like structures through accretion of calcium carbonate, in highly saline lagoons like here in Lake Thetis, Cervantes, Dandaragan Shire, Western Australia, Australia, Pacific

83-12349 - Stromatolites, one of the most ancient life forms on earth, mats of micro-organisms that become rock-like structures through accretion of calcium carbonate, in highly saline lagoons like here in Lake Thetis, Cervantes, Dandaragan Shire, Western Australia, Australia, Pacific

83-12317 - Thrombolites, a variey of microbialite or living rock that produce oxygen and deposit calcium carbonate, similar to some of the earliest fossil forms of life found on Earth, Lake Clifton, Yalgorup National Park, Mandurah, Western Australia, Australia, Pacific

83-12320 - Thrombolites, a variey of microbialite or living rock that produce oxygen and deposit calcium carbonate, similar to some of the earliest fossil forms of life found on Earth, Lake Clifton, Yalgorup National Park, Mandurah, Western Australia, Australia, Pacific

83-12318 - Thrombolites, a variey of microbialite or living rock that produce oxygen and deposit calcium carbonate, similar to some of the earliest fossil forms of life found on Earth, Lake Clifton, Yalgorup National Park, Mandurah, Western Australia, Australia, Pacific

120-4595 - Eastern shore of the Dead Sea, with salt concentration of over 20% sodium chloride (also rich in magnesium, calcium and potassium chlorides, Jordan

83-4570 - Close-up of the limestone terraces formed by volcanic water depositing six inches of calcium carbonate a year, Mammoth Hot Springs and Terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

615-669 - Calcium formations, Pamukkale, UNESCO World Heritage Site, Anatolia, Turkey, Asia Minor, Asia

83-4571 - Close-up of the limestone terraces formed by volcanic water depositing six inches of calcium carbonate a year, Mammoth Hot Springs and Terraces, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America