Silver dome ring with both textured and smooth surface. 
The ring is marked, UTC. Research suggests that this piece was made by the Ultimate Trading Company.  

Size: 7
Marked: 925 - UTC. 
Weight: 5.8 grams 
Width of dome: approximately .58" 
Width of band at smallest part: approximately 2.9 mm
Condition: some wear and scratching from regular wear.