Would love any and all help in identifying makers and approximate time of production on the following items. If you can identify the stones, that would be extremely helpful as well. I am not quite sure if the necklace and the bracelet set is vintage. The necklace with the bow clasp is made of wood. I am happy to add more pictures if requested. 
JMHO, they all look to be 1960s-70s pieces, except possibly H which may be a bit older. They could have been made by any number of costume jewelry companies. I don't see anything that points to a specific maker, sorry.
On the M necklace, look inside the hook clasp to see if it is marked there.
On this one, is there a mark where I have circled on the back?
