Pretty Navajo Sterling Silver Feather Dangle Earrings Signed JH? TH?

Pre-owned.  From an estate.  One feather is hand signed "Sterling" along with a couple of initials.  I think the second letter it H but not sure about the first letter.  Letters could be JH or TH.  The green piece looks like dyed or painted glass.  Not sure the material.  The feathers themselves measure 1 3/8" long.  About 1 1/2" long from top of hook to bottom of the feather.  Some oxidation to silver.