Lapis Lazuli Gemstone Pendant W/ Snake Chain 925 Solid Sterling Silver Necklace

Lapis Lazuli Gemstone Pendant W/ Snake Chain 925 Solid Sterling Silver Necklace Small spot on thee top of the pendant slide- see last photo I do not think the pendant is sterling sliver and it is not marked The necklace / chain is 925 Sterling silver and is marked- this chain is newer so it is in great shape I believe the red stone is a garnet but i cannot confirm this and it has not been tested