Borosilicate hard glass plugs by Glasswear Studios

Star-shaped ear weights in borosilicate hard glass from Glasswear Studios

Blue bubble front plugs in borosilicate hard glass from Glasswear Studios

Borosilicate hard glass twists in "Alien" from Glasswear Studios

Pink anodized titanium plug with a bubblegum pink opal from Anatometal Inc.

Obsidian plugs in descending size from Evolve Stoneworks

Cupcake plug in borosilicate glass from Glasswear Studios

Assorted borosilicate hard glass jewelry from Glasswear Studios