I have set a 20mm x  15mm Dendrite Agate cabochon in a fine silver setting which is melted and formed into a 1.75" by 1" teardrop.

The pendant hangs from an 18" 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