Locket A: 1 1/4" Silver tone with engine turn designs, normal wear for 110 year old piece; good working hinge & locking mechanism.
Jelly opal art glass cab: 14mm x 10mm. When seen sideways it resembles petroleum jelly (oldest stones) until seen straight on then you will see flashes of red, blue & plum. Jelly art glass can get a satin look with age, this one is shiny as ever!
Chain is 28" (doubled 14") with 3.5" below the "Y", has an old spring ring with another later one at the end to attach to this locket or any other of your choice. May or may not be original, yet of same period.