Large Antique Art Deco Silver Rainbow Iris Glass Pendant Necklace

Description: Pendant has a large colourful faceted drop shaped rainbow Iris glass. It comes on a 15” (37.5cm) sterling silver chain stamped STERLING.
Measurement: the pendant measures 4.8cm by 2cm including the bale and it is 1cm in depth.
Weight: 14.6 grams
Marked: It is not marked but has been tested positive for silver. 
Condition: In good condition with minor marks and tiny chips