Crystal Vug

A vug, vugh, or vugg is a small to medium sized cavity inside rock. It may be formed through a variety of processes. Most commonly, cracks and fissures opened by tectonic activity (folding and faulting) are partially filled by quartz, calcite, and other secondary minerals.

Colors It Comes In - Most commonly whatever color the base rock is.

​​

Classic Characteristic - Sparkly

​

Texture - Crystals are vitreous (glass-like) and feel like bumpy glass.

​

Where They Can Be Found - They are found in all forms of rock: igneous, metamorphic and sedimentary.

​

Hardness On The Mohs Scale - Most commonly a 7 but can also be the hardness of the base rock.