10K yellow gold cocktail ring. Features 6 blue/purple gemstones in a cluster. This was tested using the Presidium Gem Tester II and it the needle fell in the Tanzanite/Aqua category.  Likely purchased on the Home Shopping Network (HSN).

Size: 6
Marked: Marked CI and through research determined it is probably made by Caspian International. 
Total weight: approximately 3.3 grams
Condition: Pre-owned.