Sand

White sand is usually composed of quartz, a very resistant mineral that does not change its color easily.
White sand can also contain coral fragments, shells, or calcite, which are white or light-colored minerals.
White sand is common in tropical and subtropical regions, where the climate is hot and humid.

Red sand is often rich in iron oxide, a reddish-brown mineral that forms when iron-bearing rocks are exposed to oxygen and water.
Red sand can also contain feldspar, garnet, or other red minerals.
Red sand is typical in arid and semi-arid regions, where the weathering is intense and the vegetation is sparse.

Orange sand is usually a mixture of red and yellow minerals, such as iron oxide and quartz.
Orange sand can also contain clay, which gives it a more earthy tone.
Orange sand is common in desert areas, where the wind and water erode the rocks and transport the sediments.

Pink sand is often composed of coral, shells, or calcite, which have a pinkish hue due to the presence of microscopic algae or bacteria.
Pink sand can also contain quartz, feldspar, or other light-colored minerals.
Pink sand is rare and can be found in some islands or coastal areas, where the marine organisms accumulate and form the sand.

Purple sand is usually a result of manganese, a dark purple mineral that forms when manganese-bearing rocks are weathered and oxidized.
Purple sand can also contain quartz, feldspar, or other minerals that have traces of manganese.
Purple sand is very rare and can be found in some volcanic or mountainous areas, where the manganese-rich rocks are exposed.