New vintage minimalist birthstone pendant necklace

New vintage minimalist birthstone pendant necklace Quick list October rose zircon (I think) Gold tone hexagon pendant: 4 different textures on front, side, rim, reverse (mold?) plus tiny faux synthetic (I’m assuming) gem Gold tone long medium- thick chain New vintage c. 1970s probably by Artistic Jewellery Canada Pendant: 14 mm hexagon, 3 mm thick, 5 mm bail Chain: 22” long, almost 2 mm wide curb chain Good quality weight and construction. I’m pretty sure it’s costume. Just don’t let it get too wet for long.