Biwa, Biwa, Biwa!!!
These are all center drilled Biwa pearls.
Look at the array of colors (and there are a lot more where these came from)
Again, each pearl is a different shape with individual sheen. They come in a variety of sizes and some of larger and more dramatic than others.
Below are the finished necklaces as seen on the bust.
They close with lobster clasps and extender chains so you can wear it at your preferred length.
The blue necklace below has sheen of pink and is finished with Aqua and clear iridescent crystals.
I tried to get a good photo but they kept coming out blurry :(