This is a beautiful strand of polished stones circa 1970s, that are separated with small brass spacer beads and strung on sturdy fishing wire.  The beads are multiple shapes and sizes and run the range of the natural and earthy shades of color.  Many are striped and swirled with colors and have a substantial weight that makes them hang beautifully.  The strand is 36 inches long or opera length and are long enough to wear as a double strand.  There is a threaded barrel clasp making them easy to wear as a single or double strand