I used Clayton's for a long time . My son in law gave me an assortment of Jim Dunlops and I've been playing with the heavies for about a year . I choke up on the pick for extra attack and to split harmonics, the Dunlops hold up better . My old partner Clubhand Crawley had some alabaster picks handmade in Stowe Vt. allegedly by a one handed gypsy at great expense(About $5 ea.) . After about three gigs, you could shave with the things. but they were broken or dangerous to use after about 20 hours of playing . I tried a soapstone pick once and it sounded like someone(me) hitting my LP with a rock . Who would'a thunk ?