We have never felt comfortable calling our picks stone picks. They are gemstone picks. It's like calling a Jaguar and automobile.
Our Gemstones picks come in all four major shapes and thicknesses. The addition to tone is every bit as contributing as a bone saddle verses a plastic saddle. The gemstone will not absorb any of the vibration therefore forcing the acoustic guitar top to resonate longer.
Electrics can tell a big difference between thin and thick picks. Piercing verses a moaning effect. Rule of thumb is thin for picking and lead guitar and thicker ones for strumming and louder voicing.
Come visit out site of 7,900 itemized picks for your evaluation. You'll be glad you did. Made in the USA.