Green and Brown Jasper Stone Necklace

Full disclosure...I was not sure what this stone was, so I brought it professional. This is what he said about the necklace "This is a opaque polished Jasper stone with glass crystal beads between each stone. The closure is brass" Colors of Stones are Greens, Browns with subtle hints of reds marbled through it. Length is 18'" Each stone is appr 1.5" long x 1" wide