Several listings report that blue topaz is irradiated to enhance its color. A smaller number of multi-gem descriptions also mention heat treatment or both heat and irradiation.
Common cuts include pear and round faceted shapes. For settings, many pieces use bezel-style mounts, and several listings emphasize the faceted presentation of the blue topaz to showcase its color.
Listed chain thicknesses include about 1 mm, 1.45 mm and 1.5 mm. Some descriptions specifically reference a 1 mm cable chain.
Many items come in a gift box; some specify a custom or branded gift box. At least one listing describes a ready-to-gift package that includes a premium gift box, a thank-you card and a polishing cloth.
In multi‑gem necklaces that include blue topaz, it is paired with stones such as emeralds, opal and cultured freshwater pearls.