Agate is a mineral composed of silicon dioxide with a hexagonal crystalline structure, commonly found in banded formations with multicolored patterns that can appear different at various angles. It has a conchoidal fracture, white streak, hardness of 7, and glassy luster. Special properties of agate include being piezoelectric, often fluorescing green or white, and producing flashes of light through triboluminescence when subjected to friction, impact, or breakage. Major locations where agate is found include Kentucky and South Dakota.

1. Mineral agate
By Mary Nelson

2. Chemical Composition=SiO2
Group=Quartz
Crystalline makeup= Hexagonal

3. Uses

4. Properties
Fracture= conchoidal- curved breakage
Streak= white
Hardness=7
Color= multicolored in banded formation. Rare agates are
iridescent- can be different colors at different angles
Luster=glassy

5. Special
Properties
Piezoelectric- substance that generates an
electrical charge when under stress
fluorescent- usually glows green or white
triboluminescence- flash of light
produced when a material is subject to
friction, impact, or breakage
http://geology.com/minerals/triboluminesce
nce/

6. Where are Agates Found?
Kentucky
South Dakota

7. Where are Agates Found?
Kentucky
South Dakota