Vintage Green Agate Or Quartz Pin And Ring Set

An unusual set of a ring and a pin created from green semiprecious stones.  I believe they may be an agate or quartz of some type.  They do not appear to have been dyed and are a lovely deep green color with some swirls of gray and clear.  The settings are goldtone and the ring has an adjustable band.  The pin is accented with a feather.  The cabachon on the pin is approx. 30x22mm and the stone in the ring is 18mm across.