New 712 carat genuine Mexican agate disk bead necklace 20-22"

Genuine Mexican agate necklace has beautiful color variations from white to beige to rust red to grey to black. Silvertone extender with lobster clasp adjust necklace 20 to 22". Stone disks are finely polished and graduate in size from 3/4" to about 1-1/4" wide. (a US quarter is 1") 712 carats of semi precious gemstone, brand new!