Crystals 

Chakra: Heart ( 4th) and throat (5th)
Element: Water

Chakra: Third Eye 6th, Crown 7th
Elements: Air/Wind

Chakra: Throat 5th, Heart 4th
Element: Water

Chakra: Root 1st
Element: Earth

Chakra: All, especially Third Eye 6th
Element: Storm ( referred to as Ether Spirit)

Chakra: Throat 5th
Element : Water

Chakra: Solar Plexus 3rd, Sexual Creative 2nd
Element: Fire

Chakra : All
Elements: All ( Earth/Fire/ Air/ Water)

Chakra: All, especially Third Eye 6th and Throat 5th
Element: Wind /Air

Chakra: Crow 7th
Element: Air/ Wind

Agate comes from the rock formation class of Chalcedony and also quartz.

Chakra: Solar Plexus 3rd
Element: Earth