049be8fe___Fire_Mountain_Gems_and_Beads__2
[0] Metal Lined [1] Metal lining inside the hole of beads--often silver, gold or copper [3] Some issues with durability by individual use [4] Some issues with durability by individual use [2] 
Some issues with durability by individual use
Chart - Seed Bead Finishes and Treatment Durability - Fire Mountain Gems and Beads
2