Canada

Museum of Nature, Ottawa, Canada

Canada

Museum of Nature, Ottawa, Canada

Canada

Museum of Nature, Ottawa, Canada

Canada

Museum of Nature, Ottawa, Canada

Canada

Amphibole, Museum of Nature, Ottawa, Canada

Canada

Museum of Nature, Ottawa, Canada

Canada

Museum of Nature, Ottawa, Canada

Philippines

Marble Products in Romblon, Philippines.

Sweden

Rixö red granite quarry in Lysekil, Sweden

UK

Craigleith, an island in Scotland, composed of essexite

UK

The East Tower of the Royal Observatory, Edinburgh. The contrast between the refurbished copper installed in 2010 and the green color of the original 1894 copper is clearly seen.

Russia

Columnar basalt at Cape Stolbchaty, Russia

USA

The most famous colored diamond, the Hope Diamond

Argentina

Inyoite from Monte Azul deposit, Sijes, Salta, Argentina

Mexico

Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico

USA

Grand Prismatic Spring and Midway Geyser Basin in Yellowstone National Park

Mars

Mackinac Island

Mars

This picture was taken by the Viking Lander 1 on February 11, 1978 on Sol 556. The large rock just left of the center is about two meters wide. This rock was named "Big Joe" by the Viking scientists. The top of the rock is covered with red soil. Those portions of the rock not covered are similar in color to basaltic rocks on Earth. Therefore, this may be a fragment of a lava flow that was ejected by an impact crater. 

Mars

THEMIS close-up view of ejecta from 17-km diameter crater at 21°S, 285°E. Note prominent rampart.