Aplite

Aplite properties at a glance

Geology & background

Forms when silica-rich residual magma crystallizes quickly in small dikes or veins, producing a fine, even-grained granitic texture.

Aplite helps geologists recognize late-stage granitic melts and small intrusive dikes.

How to identify Aplite

• Look for a light-colored, sugary, fine-grained granitic texture.
• Aplite is usually finer and more uniform than pegmatite.
• It commonly appears as veins or dikes associated with granite.
• Visible quartz and feldspar support the identification.

Where Aplite is found

Reported from multiple igneous terrains worldwide; verify locality against specimen provenance when available.

How much is Aplite worth?

Aplite is usually valued for teaching, field context, locality, texture, color, mineral content, or unusually attractive specimens rather than high gem value.

Common uses

• Field identification
• Education
• Granitic intrusion study
• Collector specimens

Interesting facts

• Aplite is usually finer grained and more even textured than pegmatite.
• It commonly occurs as dikes cutting larger granitic rocks.
• Quartz and feldspar are the main visible ingredients.

Care & safety

Aplite can vary in toughness, porosity, vesicles, glass content, and weathering depending on cooling history and mineral mix.

Avoid inhaling dust. Do not cut, grind, or polish unknown igneous rocks without eye protection and a properly rated respirator.

Related rocks & minerals

Quartz Quartz Family Feldspar Feldspar Group Muscovite Minerals Biotite Minerals Andesite Igneous Rocks Anorthosite Igneous Rocks