see also properties of agate

colour/appearance:

light sky blue to a rich cornflower blue and range into a lavender/purple blue

sources:

washington (usa)

cleansing:

cleanse with running water method
energize on an amethyst or crystal quartz cluster or in sunlight

element(s):

earth, water

chakra(s):

throat

best combined with:

feng shui use:

center (balance/connection to the natural world)
northeast (wealth)
southwest (love)
negative direction misfortune (protection/combat illness)

physical:

enhances stature

heart

emotional:

helps bring the energy needed so that we can fully appreciate and understand our abilities, characteristics and situations
enables to see and speak the truth without thinking of consequences

enhances communication and speech making

spiritual:

opens the throat chakra