Junxin Women's Fashion Pendant Necklace.  925 Sterling Silver Filled Openwork Filigree Dragonfly, with synthetic Blue Fire Opal Accents.  Silver Snake Chain, likely a lobster clasp end, no mention of an extender, about 15.75in long. 

Item Type: Necklaces
Fine or Fashion: Fashion
Necklace Type: Pendant Necklaces
Brand Name: JUNXIN
Style: Trendy
Chain Type: Snake Chain
Gender: Women
Shape\pattern: Animal
Model Number: NL0061
Material: Opal
Metals Type: 925 Sterling Silver Filled
Necklace: Wedding/Engagement/Party/925 Sterling Silver Filled Opal Necklace