New to pearls and curious about these I found?

[Tfraguad]

Thinking the color and shapes are wrong most likely. Although I think style is called circle and Tahitian do come
In that variety. I am trying to learn but I am still having a hard time.

 

[A Breaker]

I am getting fairly strong Chinese Freshwater vibes..Hopefully others will give better opinions. The coloring & shape aren't quite right for saltwater. But I still have one strand that isn't quite right for freshwater nor quite right for Tahitian, as I learn more I will figure it out.

 

[MrGray]

I would also say freshwater.

 

[pattye]

I agree, ringed freshwaters. It is difficult to explain. The colors lay differently on Tahitians. One seldom sees bright green and bright blue on the same pearl. Strong blue is rare in 1 Tahitian pearl, even more rare to have a strand with many blues. Shapes are off, as A Breaker mentioned.
Having a whole strand like this makes it easier to id than a single pearl, imo. Fun and wearable pearls!
@Tfragaud, welcome to the forum and keep asking questions!

 

[BWeaves]

They look like dyed freshwater pearls to me, too. The colors aren't right for Tahitians, but they look similar to dyed pearls I bought at bead stores years ago.