Lucas Bustamante / Golden-Tailed Sapphire (Chrysuronia oenone) Sumaco National Park, Napo, Ecuador

Agustin Esmoris / Gilded Hummingbird (Hylocharis chrysura) feeding on flower nectar, Argentina

David Hall / Blue damselfish (Pomacentrus pavo), portrait. Komodo, Indonesia.

Shane Gross / Underwater view of a blue hole in The Bahamas known locally as the Sapphire blue hole. Eleuthera, Bahamas.

David Gallan / Botany Bay diamond weevil (Chrysolopus spectabilis), New South Wales, Australia, January.

Hermann Brehm / Gilded sapphire (Hylocharis chrysura) feeding from flower, Pantanal, Brazil

Alex Mustard / Staghorn coral (Acropora cervicornis) growing on a coral reef and creating a home for Blue chromis (Chromis cyanea). East End, Grand Cayman, Cayman Islands. British West Indies. Caribbean Sea

Adrian Davies / Blue-chinned Sapphire (Chlorestes notata notata) male flying, Trinidad.

TJ Rich / Cutting sapphires using traditional equipment, Ratnapura, Sri Lanka, December 2012.

TJ Rich / Cut, polished and rough sapphires, Sri Lanka.

TJ Rich / Sapphire cutting, Ratnapura, Sri Lanka, December 2012.

Thomas Marent / Cat's-eye Sapphire (Lasaia arsis) butterfly, Rio Claro Nature Reserve, Antioquia, Colombia