Listings show a variety of lengths, typically from about 0.18 inches up to 1.63 inches; one listing specifies a 13 mm length.
Common finishes include rhodium plated over .925 sterling silver and 18kt yellow gold plated over sterling silver; some listings specifically note .925 sterling silver with rhodium plating.
Listings commonly pair sky blue topaz with diamonds or lab-grown diamonds, sapphires, cultured pearls, and other colored gems such as amethyst, garnet, peridot, and citrine.
Most listings use sterling silver or 18kt yellow gold plated over sterling silver; one description also specifies .925 sterling silver with rhodium plating.