Garnierite, also known as Green Moonstone, gemstone beads in a teardrop shape with apple green and grey colouring.  The crystal beads are side drilled near the top and would be ideal to use with leather or cord as they have a large approx 2 mm hole.  This stone is actually a nickel ore and a variety of Serpentine.

See more beads here

Size: 2.9 - 3.1 cm approx measured at the largest points
Weight: 9 - 10 grams approx  

Please note that you'll get a bead similar to the ones shown in the photo.