Sand geology

Quartz sand

Heavy mineral sand

Volcanic sand

Desert sand

What is sand made of

Sand minerals

Greensand and green sand

What is black sand

Silica and sand

Ooid sand

Gypsum sand

Remnants of bottle messages

Heavy minerals

Blue sand from Namibia

Coral sand

Colors in sand

What is sand

Rock Types

Obsidian

Diabase
Dunite
Gabbro
Serpentinite
Trachyte
Charnockite
Harzburgite
Epidosite
Greisen
Pumice
Laterite
Gneiss
Conglomerate
Syenite
Peridotite
Sandstone
Pegmatite
Monzonite
Amphibolite
Chert
Arkose
Dolomite rock
Oil shale
Oolite
Coquina
Limestone
Eclogite
Porphyry
Aplite
Basalt
Ignimbrite
Tuff
Scoria
Diatomaceous earth
Anthracite
Bauxite
Quartzite
Bog iron
Hawaiite

Geological concepts

Anorthosite and labradorescence

U- and V-shaped valleys
QAPF diagram
Graphite schist with pyrite
TAS diagram
Dendritic growth in crystals
Composition of the crust
Principle of inclusions
Volcanic bomb
Igneous rocks
Xenolith
Conchoidal fracture
Ventifacts and dreikanters
Types of Lava Flows

Minerals

Magnetite

Dolomite
Zircon
Quartz
Talc
Glauconite
Epidote
Augite
Calcite
Halite
Andalusite
Pyrite
Olivine
Garnet

Varia

How to take good macro photos

Great circles and flight paths

Geological trips

Houses built from diamonds and impact breccia

Giant’s Causeway

Green Sand Beach