RockVault
Agate

Image: <a href="//commons.wikimedia.org/wiki/User:LadyOfManyTalents" title="User:LadyOfManyTalents">LadyOfManyTalents</a> (CC0)

trigonalcommonSilicates

Agate

SiO2

This polished specimen of Kentucky agate features soft pink tones with intricate banding, showcasing its natural beauty after being cabbed. It exhibits a smooth, polished surface.

Agate Physical Properties

Mohs Hardness

6.5

Crystal System

trigonal

Luster

vitreous

Streak Color

white

Cleavage

none

Fracture

conchoidal

Specific Gravity

2.6

Colors

pink, white, grey

Transparency

translucent

Type Locality

Estill County, Kentucky

Mineral Group

Silicates

Uses

jewelry, ornamental objects, carvings

Associated Minerals

quartz, calcite, zeolites

Rarity

common

Geological Context

Agates typically form in cavities within volcanic rocks, where silica-rich fluids deposit successive layers over time. The pink coloring in this specimen is due to trace mineral inclusions during its formation.