This is a 925 Silver Natural Rutile Quartz stone Pendant Necklace from Thailand.
The stone is natural and the black Rutile Quartz is created when Titanium Dioxide mineralizes in the quartz stone as it forms in the earth. The stone was well polished and quite clear. It was set in 925 sterling silver.
Size: 1.1" tall and .8" wide ( 2.8 cm tall and 2.3 cm wide )
Weight: .34 oz ( 9.6 gm )