SPS is a supplier of Fine Silver and 22k Granules in three sizes.
They are the most expensive on the market but used to be the only
supplier. Rio Grande sells Argentium granules (1 ounce minimum).
David Gnat -414-774-7190 (a former student of mine) has best prices.
Price break depends on quantity, so smaller amounts are available.
David offers at least 7 different sizes in FS, 18k, 22k, 24k.