Bonanza.com has a nice selection
Pandora Jewelry has a wide variety of jewelry products They have a popular bead charm line that would allow you to really personalize a gift for your wife. Pandora does make a quality product that I have had excellent personal experience with. I have found the best selection at their dedicated Pandora stores.
I am unsure about Pandora charms but, if you visit Rocks TV their charms are exquisite, very low price, they are real and you receive authenticity with them
Biagi beads are a decorative bead that is used on bracelets or other jewelry. They have become really popular on certain pandora bracelets etc.
When building a personalized Pandora bracelet there are many options of charms available to choose from such as Gold, Silver, Glass, Enamel, and Pave. These range from decorative charms, to mementous charms.
To add a bead clasp to your jewelry design, you can use a small bead with a hole large enough to fit your stringing material. Thread the string through the bead and tie a secure knot. This creates a stylish and secure closure for your jewelry design.
A 7mm bead is .275 inches in diameter (through the hole).
I bought a Donna Mia murano glass bead for my Pandora and it fits perfectly. They have a different locking mechanism to the Pandora beads, but it does fit.
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The term clay bead is a designation for a fired unglased ceramic bead. These are popular as "natural" decorations and are usually brown in color. The acrylic clay beads are also "clay beads" and they are usually a pressed bead. Since the acrylic beads are easily made, they are cheap and useful in most craft jewelry.
The spelling "bead" is a small object strung as jewelry, a wooden border strip, or a line of material as in caulking.
Super glue
eBay or your local bead shop might be interested.