Author Patti Polk is recognized as one of the top agate collectors in the world (as noted in the highly respected reference book Agates III by Johann Zenz). She has been collecting, cutting and polishing rocks for jewelry and display for more than 20 years. She has been published in Rock & Gem magazine and numerous other periodicals; she speaks at rock and mineral club programs and frequently serves as a trail guide for visitors to Arizona. Patti is a skilled lapidary artist, which includes the cutting and polishing of the stones into display specimens or cabochons for jewelry making. She also designs and creates fine silver jewelry with the gemstones. She continues to study the earth sciences to keep abreast of any new findings, and to further her knowledge of rocks and minerals in general.