Agate

Aries, Taurus, Leo, Virgo

    It is a variety of chalcedony (variety of silicon, also a hard translucent and abrasive) with multiple colors arranged in different concentric layers, which draws its name from the river Achates in Sicily. Discoverer Theophrastus of Eres, Greek philosopher and naturalist, known for thousands of years, used as decorative stone but as talisman against poisons and to think that has the ability to suppress storms. China is regarded as important stone balances Yin-Yang energy.

Description: Presents a variety of colors but are mainly gray and gray-blue, blue, black, pink, reddish, or green blue, dark orange.

Interesting is that this rock it changes color at high temperatures, mainly by burning. 

Beneficial effects: help communication, eliminate negativity and calm and has beneficial effects on the neck, spine, stomach, spleen and liver.  They also say that the wearing such jewelry manages to turn negative energy into creative energy.