Erlend Haarberg / Marble formations in alpine landscape. Lahko National Park, Fjell, Norway, July.

Pete Oxford / Tiger tree frog (Hyloscirtus tigrinus) captive, endemic to Ecuador.

Gavin Hellier / Women in colourful Saris, beside the Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, 2011. Model released.

Ross Hoddinott / Marbled White butterfly (Melanargia galathea) resting on grass, Dunsdon Nature Reserve, Devon, UK. July

Ross Hoddinott / Marbled White butterfly (Melanargia galathea) at rest, Dunsdon Nature Reserve, Devon, UK. July.

Philippe Clement / Water in the abandoned red marble quarry of Carriere de Beauchateau in the Belgian Ardennes, Belgium, August 2012

Mark Taylor / 'The Marble Cathedrals' - marble rocks dissolved and sculpted by water. Rio Tranquilo, Chile, March 2010.

Robert Thompson / Long John Silver stalactite in the Marble Arch Caves, Enniskillen, County Fermanagh, Northern Ireland, UK, January 1995

Jack Dykinga / Lichen covered rocks at Marble Viewpoint, Kaibab National Forest, Grand Canyon National Park, Arizona, USA

Jack Dykinga / Lichen covered rocks at Marble Viewpoint, Kaibab National Forest, Grand Canyon National Park, Arizona, USA

Jack Dykinga / Marble Canyon and the Colorado river, Grand Canyon NP, Arizona, USA

Jack Dykinga / Water from flash floods cascades down Marble Canyon into the Colorado River, Grand Canyon NP, Arizona, USA

Michel Roggo / Marble trout (Salmo trutta marmorata) morph of the Brown Trout, male and female at spawning ground, Tolminka river, Slovenia, 2005

Michel Roggo / Marble trout (Salmo trutta marmorata) morph of the Brown Trout, female at spawning ground, Tolminka river, Slovenia, 2005

Michel Roggo / Marble trout (Salmo trutta marmorata) morph of the Brown Trout, at spawning ground, Tolminka river, Slovenia, 2005

Scott Leslie / Osprey (Pandion haliaetus) carrying Marble Cichlid (Astronotus ocellatus) prey, Viera Wetlands, Florida

Yva Momatiuk & John Eastcott / California Condor (Gymnogyps californianus) immature bird flying with transmitter attached, critically endangered extinct in wild and recently re-introduced, 9-10 foot wingspan, Marble Canyon, Arizona

Jack Dykinga / Pair of California condors (Gymnogyps californianus), saved from extinction, performing courtship behavior on cliff's rim rocks. Marble Canyon above Colorado River, Arizona, USA.

Jack Dykinga / California condors (Gymnogyps californianus), saved from extinction, perched on iron work girders of Navajo Bridge. Marble Canyon above the Colorado River, Arizona, USA.

Jack Dykinga / California condor (Gymnogyps californianus), saved from extinction, soaring warm thermals. Marble Canyon above the Colorado River, Arizona, USA.

Jack Dykinga / California condor (Gymnogyps californianus), saved from extinction, ready to take off, spreading its wings to soar. Marble Canyon above the Colorado River, Arizona, USA.

Jack Dykinga / California condor (Gymnogyps californianus), saved from extinction, perched on canyon's edge, ready to spread its wings to soar. Marble Canyon above the Colorado River, Arizona, USA.

Jack Dykinga / California condor (Gymnogyps californianus), saved from extinction, perched on canyon's edge, ready to spread its wings to soar. Marble Canyon above the Colorado River, Arizona, USA.

Jack Dykinga / California condor (Gymnogyps californianus), saved from extinction, soaring warm thermals. Marble Canyon above the Colorado River, Arizona, USA.

Jack Dykinga / California condor (Gymnogyps californianus), saved from extinction, flying, bending its wings to land. Marble Canyon above the Colorado River, Arizona, USA.

Franco Banfi / Fish swimming over pieces of marble and red brick covering floor in one of rooms located in submerged ancient Roman Nymphaeum of Emperor Claudius. Marine Protected Area of Baia, Naples, Italy. Tyrrhen...

Guy Edwardes / Marbled white (Melanargia galathea) butterflies roosting on Knapweed buds, Badbury Rings, Dorset, UK, July.

Guy Edwardes / Marbled white (Melanargia galathea) butterflies roosting on Pyramidal orchid (Anacamptis pyramidalis) flowers, Badbury Rings, Dorset, UK, July.

Guy Edwardes / Marbled white butterfly (Melanargia galathea) roosting on Scabious flower (Scabiosa sp.), Badbury Rings, Dorset, UK, July.

Guy Edwardes / Marbled white butterfly (Melanargia galathea) roosting on grass stem, Badbury Rings, Dorset, UK, July.

Andy Sands / Marble Gall wasp (Andricus kollari) female ovipositing into bud of Turkey oak tree, the offspring will go on to produce the marble oak gall on Sessile oak, Hertfordshire, England, UK, March.

Marie Lochman / Marble hakea (Hakea incrassata) nut, northern sandplains, Western Australia, Western Australian endemic, June

Marie Lochman / Marble Hakea (Hakea incrassata), northern sandplains, Western Australia, Western Australian endemic, June

Pal Hermansen / Marble quarry, near Alicante, Spain. July 2016

Robert Valentic / Marble-faced delma (Delma australis) basking on sand within mallee / heathland. Near Pinnaroo, Murray Mallee, South Australia.

Sirachai Arunrugstichai / Blotched fantail / Marble ray (Taeniurops meyeni) on the seafloor in the late evening, foraging for food near a fish factory, Male Atoll, Republic of Maldives.

Pal Hermansen / Marble quarry, two trees in foreground. Near Alicante, Spain. July 2016.

Juergen Freund / Slabs of rock in marble quarry. Chillagoe, Mareeba, Far North Queensland, Australia. 2015.

Juergen Freund / Blue quandong (Elaeocarpus angustifolius) tree with fruit, in canopy. Daintree Rainforest, Wet Tropics of Queensland, Australia.

Robert Thompson / Arched marble moth (Olethreutes arcuella) Pyrenees National Park, France

Orsolya Haarberg / Distorted layers of marble and other metamorphosed sedimentary rocks, on a lake shore. Lahko National Park, Norway.

Orsolya Haarberg / Coastal landscape with marble formations and cushions of roseroot (Rhodiola rosea). Tomma Island, Helgeland Archipelago, Norway. July.

Orsolya Haarberg / Coastal landscape with marble formations. Tomma Island, Helgeland Archipelago, Norway.

Orsolya Haarberg / Coastal landscape with marble formations. Rocks illuminated by the warm light of the setting sun. Tomma Island, Helgeland Archipelago, Norway. July.

Orsolya Haarberg / Coastal landscape with marble formations. Rocks illuminated by the warm light of the setting sun. Tomma Island, Helgeland Archipelago, Norway. July.

Orsolya Haarberg / Coastal landscape with marble formations. Tomma Island, Helgeland Archipelago, Norway. July.

Philippe Clement / Carriere royale de l'Espiadet marble quarry at Payolle, Haute-Bigorre, Hautes-Pyrenees, France. September 2018

John Cancalosi / Cotham Marble / Landscape Marble, Rhaetian, uppermost Triassic stromatolitic limestone from the Penarth Group. Found in South Wales and Southwestern England, around Bristol, possibly extending to the...