Handmade Rainbow Fluorite Stone Guitar Pick (JAZZ SIZE) 2.25mm Tapered to Approximately 1mm Point.
Fluorite on the Mohs scale of hardness = 4 Agate = 7-7.5
Fluorite is a much softer stone than agate and has a possibility to wear down with extreme use. it may not wear down at all depending on your playing style, string gauge, pick attack, etc...