14k gold filigree hoop earrings not marked

I have these 2 14k gold filigree hoop earrings which are not marked anywhere, only mark stamp is on the slide piece, whatever that's called.
I tested one earring several times on my test stone with 14k gold acid, each time it test positive but, no stamps anywhere.
What could this mean ? These where purchased by me from an elderly lady last Friday, she sold me a few pieces of jewelry and also a 14k gold rope chain which she said only $1, I told her it was gold and I would give her $30 for it, it weighs 1 gram. She was so happy I gave her $30 for the chain, she gave me a big hug and was so thankful, sometimes I feel like Jesus, just kidding, it just makes me feel good to help people out.
Sometimes I go home and cry a few tears for people I have met, sorry for my long story, just feeling peoples sorrows...

 

The hoops are poorly cast and basically semi finished with porosity.I guess you didn't know that precious metal objects are not required to be stamped in the States for purity.

 

Yes poorly cast, I see that. where could they be from ?

 

The world is big... pick a location.

 

Hmmm, Puerto Rico

 

These are usually stamped on the posts. Very tiny stamp. Can get worn off from the butterflies sliding over it.

 

Hmm, okay, I'll check them.