Basalt

• Vesicular(holes)
• Volcanic
• Mafic
• No crystals

Pumice

• Vesicular (holes)
• Volcanic
• Felsic
• No crystals

Andesite

• Aphanitic (small grains)
• Volcanic
• Intermediate (a little more dark)
• No crystals

Diorite

• Phaneritic (course grain)
• Plutinic
• Intermediate (more dark)
• Crystals

Granite

• Phaneritic
• Plutonic
• Felsic
• Crystals

Gabbro

• Phaneritic
• Plutonic
• Mafic
• Crystals

Obsidian

• Glassy
• Volcanic
• Felsic
• Can sometimes be black

Rhyolite

• Glassy
• Volcanic
• Felsic
• No crystals