My mother's Necklace and hair pins from early 1900s

The item were my mother's. She was borne in 1900. It is my understanding she had them when she was as young as a 16 years old. the necklace is a kind of metal beads. Now the beads tends to come apart - made of two pieces- 2 pieces together to make the bead. I am not sure when the string inside came about. The 3 hair pins my mother had from about the same age. I am interested to know whether there is any history about them such as makers of these beads, what years they made them and what the kind of metal is.