2 Sterling Silver Deco-Style Marcasite & Onyx Brooches: Wear as Pins or Pendants

Description

These two pins are faithful reproductions of Deco-style geometric bar pins.  A prong-set tapered tube of onyx is surrounded by pavé-set round marcasite (pyrite) rose cuts.
These were made by the same company in Thailand (it uses the maker's mark "DK") but the pin hardware is set at different ends and the stamps are different.  One is stamped "DK" plus "SILVER 925" and the other is stamped "925" and "SILVER" with no maker's mark.
Together, the pins weigh 11 grams.  They're each about 2" long and 3/8" wide (at the widest point).
These are new old stock.  They've been stored for a long time, but they've never been worn, except by my lovely mannequin.
I think these make a cool double pendant so I'm including a twisted fiber (silk or rayon, I'm assuming) cord -- the same one shown in the photos.  It's 4mm thick and about 17" long.  The clasp is a black brass push-in tube.