Hand made using genuine Baltic Amber from Lithuania. Using super strong silk cord, knotted between each bead for extra safety and with a safety screw clasp. These are not stretchy so you will need to order exact size. There is no difference between the colours, they all have the same effect so I will send a random colour or mixture of colours depending on what beads I have available. If you have a prefernce between light and dark amber then please add a note at checkout and I'll try my best.