What type of rock is Quartzite?

What type of rock is Rhyolite?

What type of rock is Pumice?

What type of rock is Obsidian?

What type of rock is Gabbro?

What type of rock is Diorite?

What type of rock is Phyllite?

What type of rock is Granite?

What type of rock is Peridotite?

What type of rock is Pegmatite?

What type of rock is Halite?

What SPECIFIC TYPE of rock is Halite?

What type of rock is Basalt?

What type of rock is Syenite?

What type of rock is Gypsum?

What SPECIFIC TYPE of rock is Gypsum?

What type of rock is Dolostone?

What SPECIFIC TYPE of rock is Dolostone?

What type of rock is Scoria?

What type of rock is Andesite?

What type of rock is Limestone?

What SPECIFIC TYPE of rock is Limestone?

What type of rock is Coal?

What SPECIFIC TYPE of rock is Coal?

What type of rock is Mudstone?

What type of rock is Coquina?

What SPECIFIC TYPE of rock is Coquina?

What type of rock is Conglomerate?

What type of rock is Breccia?

What type of rock is Gneiss?

What type of rock is Sandstone?

What type of rock is Shale?

What type of rock is Marble?

A very hard rock formed from sandstone, resistant to scratching. It is white, gray, or pink with a hard, glassy texture.

A dense volcanic rock rich in iron and magnesium, commonly used in construction. It is dark gray to black with a fine-grained or vesicular texture.

An intermediate lava rock often forming volcanic domes and composite cones. It is usually gray, greenish, or brown with a porphyritic (mixed fine + large crystals) texture.

A silica-rich volcanic rock chemically similar to granite but fine-grained. It is typically light gray, pink, or pale with a smooth or glassy texture.

A highly vesicular volcanic rock that is heavier than pumice and sinks in water. It is dark red, brown, or black with a rough, porous texture.

A lightweight volcanic glass full of air holes, so light it can float on water and can be ground into powder for abrasives. It is white, light gray, or cream with a frothy, porous texture.

A volcanic glass that fractures into sharp edges, often used for ancient tools and blades. It is usually black, dark brown, or greenish with a glassy texture.

Known as the “salt and pepper rock” because of its speckled appearance. It is black and white spotted with a coarse-grained texture.

A very durable felsic rock often used for buildings and monuments. It is pink, gray, or white with black minerals and has a coarse-grained texture.

Similar to granite but low in quartz, making it slightly darker and smoother in mineral composition. It is pink, gray, or reddish with a medium- to coarse-grained texture.

An ultramafic rock rich in olivine, considered the main rock of Earth’s mantle. It is dark green to black with a coarse, granular texture.

An intrusive rock with extremely large crystals, sometimes containing gemstones like tourmaline or beryl. It is light-colored (pink, gray, white) with a very coarse crystalline texture.

Common rock salt that dissolves easily in water and tastes salty. It is colorless, white, or light pink with a crystalline texture.

A carbonate rock rich in dolomite that reacts weakly with acid compared to limestone. It is gray, white, or tan with a crystalline, granular texture.

A calcite-rich rock that effervesces strongly with dilute acid and often contains fossils. It is gray, tan, or white with a fine-grained to fossiliferous texture.

A carbon-rich organic rock that burns as fuel and shows shiny to dull surfaces. It is black or brownish-black with a brittle, layered texture.

A fossiliferous limestone made almost entirely of loosely cemented shells. It is light yellow, tan, or gray with a coarse, shell-packed texture.

A sedimentary rock made of rounded pebbles cemented together. It is multi-colored with a gritty, pebbly texture.

Fine-grained rock that splits easily into thin sheets. It is usually gray, black, or brown with a smooth, fissile texture.

Similar to shale but does not split into sheets, breaking into blocks instead. It is gray, brown, or black with a smooth, massive texture.

A foliated rock with distinct banding of light and dark minerals, showing high-grade metamorphism. It is black, white, gray, or pink with a coarse, banded texture.

Recognized by its silky sheen caused by tiny mica crystals. It is gray, greenish, or silvery with a fine, wavy foliated texture.

A recrystallized limestone that effervesces with acid and is prized for sculpture. It is white, pink, or green with a smooth, crystalline texture.