If you put a very bright light (like a cellphone flashlight) behind these Montana agates, you can see bands of iris agate. Iris or rainbow agate occurs when the microcrystalline quartz atoms align themselves in such a way that when the light hits, refraction, or a light rainbow, is visible. 

Dope. 

Set in sterling.

Just under 3 inches in length. Lightweight. 

A simple trick to help wear big/heavy earrings is to snip off the bottom of a band aid, place it as a patch behind your ear, and poke the earlier through. This will help spread out the pull on your earlobes, reducing stretching and fatigue.