I have set a 13mm x  9mm  Dendrite Agate cabochon and a 7mm x 9mm Tourmaline in a fine silver setting.

The pendant measures 1.5" by 1" and hangs from a sterling silver chain. 
 
Please be aware that the size of jewelry in photographs can be deceptive so be sure to read the measurements carefully before you purchase.
 
I design and make all of my jewelry in my home studio in Texas.
For updates on new jewelry follow me on Instagram
https://www.instagram.com/coldfeetstudio