Agate is a variegated class of chalcedony; usually exhibiting colored bands or other markings. However some agate is not patterned.
Balances yin-yang energies
Stabilizes & cleanses the aura
Acts to smooth dysfunctional energies and to both transform and eliminate negativity
Helpful when examining oneself & the circumstances relevant to their well-being
Can be placed in water for use in cooking and/or for drinking to dispel sickness
Has been used to strengthen sight, diminish thirst, & to promote marital fidelity
Astrological sign of Gemini
These properties are common to all members of the Agate family. However, each individual type of agate possesses further qualities. Use your knowledge of color and charkas to enhance the agate properties listed above accordingly:
Blue Lace Agate: most useful for throat chakra, communication, calming, etc.
There are most likely hundreds of different agates that have not been categorized so have fun with them. You might discover one that has never been seen before.