Whether it's crafted in yellow gold, white gold, rose gold, sterling silver, or platinum, box clasps are typically matched to the metal of the piece they're on and fabricated to match its finish quality. Same metal, same surface, same weight. The detail work is what makes it disappear.
Stone Story
Gemstones cut to match a specific geometric setting outline (rectangular, square, or tapered) calibre-cut stones allowed Art Deco jewelers to fill complex geometric forms with perfectly fitted colored stones, producing the graphic, enamel-like color fields that became one of the defining visual characteristics of the period's most accomplished work.
Care & Keeping
A figure-8 safety requires little beyond keeping the loop clean and unobstructed. Periodic inspection by a jeweler is worth doing to confirm the solder attachment remains secure.