This lovely 14k white gold #13 ring features an onyx stone with the lucky number emblazoned on the front. Filigree shoulders frame the design in an elegant setting that emits a dark, spunky style that’s hard-to-find from an art deco era. 
Whilst the number 13 is sometimes considered “unlucky”, in ancient cultures the number 13 represented femininity as it corresponded to the number of lunar (menstrual) cycles in a year (13 × 28 = 364 days). 
Size: Approx. 4.5 US. 
Materials: Band is 14k white gold (acid tested); the #13 symbol on the front cannot be tested due to its position and is therefore an unknown metal (likely gold or silver—the 13 appears a pink or yellowish gold color depending on the light). 
Hallmarks: None. 
Condition: Great. There’s a hole in the middle of the onyx where there should’ve been a screw. It’s possible it originally held some other design, and was at one point replaced with the #13. 
Circa 1920s