Junxin 925 Sterling Silver Filled Women's Pendant Necklace.  Silver Cat Pendant with Blue Fire Opal slices.  Snake Chain, like a lobster clasp, but short, at almost 16", nearly a choker. I don't see any indication of an extender chain.

Item Type: Necklaces
Fine or Fashion: Fashion
Necklace Type: Pendant Necklaces
Brand Name: JUNXIN
Style: Trendy
is_customized: Yes
Chain Type: Snake Chain
Gender: Women
Shape\pattern: Animal
Model Number: NL0077
Metals Type: 925 Sterling Silver Filled
Material: Opal Necklace