I've recently acquired a Pool of Light bracelet and necklace/choker. I've been reading quite a bit about them and find them fascinating. Here's some of what I've found:
For thousands of years this optically clear quartz has been used as gemstones because of its enchanting ability to absorb and affect light. Possessing the property of double refraction (where images viewed through them appear upside-down and reversed) these works of art are from turn of the century and are increasingly more difficult to find, especially in wearable condition. Pools of light jewelry were believed to have a magical and mystical effect on the wearer.
I find them quite beautiful. I looked through my bracelet's orbs and everything does appear upside down. It's quite fascinating!
Here's some more info on Pools of Light:
Pools of light jewelry carries a mystique all its own. The ancient Chinese held the belief that the chi of good luck resided within each bead, and if drilled would escape. As a result the orbs that make up "pools of light" are solid and joined using wraps usually made of silver.
All of the information I've found says that Pool of Light jewelry is pre-1930's. If anyone has heard anything different, please let me know.
I've included a picture of my bracelet. I'll post pictures of the choker soon.