Featured Could you help with age and origin of 3 Necklaces Please?

These three necklace came in a lot and although they are not in best shape, I would like to know the age and if possible the origin of each. I have more pictures if needed. Thank you in advance on your opinions and advice.

First up is a double strand of pearls which I think are real. I did the tooth test and they feel gritty (and heavy). It has cameo box clasp which is also a pin. It is not the prettiest cameo I have ever seen. It 22 inches. I believe the tongue on one side of the cameo is broken as only one side disengages.

Second is a pink cased glass 5 strand beaded necklace, 13 inches with large foiled fabric roses at the ends, a hook clasp and dangles from with chain extender and the flowers.

Third is another double strand pearl necklace with a hook clasp. The front is interesting as it has blue frosted glass flowers, golden leaves, rhinestones and seed pearls. The leaves have finish loss/discoloration.

 

I see greenies on the 3rd one, keep it away from any other jewelry, it can spread

 

Especially if its "live" green. Dead, powdery pale, green isn't a threat. It all looks like 1950s and 1960s.

 

They are all separated from everything. I haven't tried cleaning any of them yet so I don't know if the green is live or powdery. They are such pretty pieces, I am sorry to see them in their current condition.