I am sorta of lazy with mine. I tend to raid marshalls,ross and tj max and buy the mary elizabeth spice blends. Then i will take tsp or a tbspn of say the kansas city blend, the garlic blend, the pepper blend and maybe the herbs du provence and crush it then coat a piece of meat with it, usually lamb and roast that and use at least some of the rest for the accompanying vegetable.
If I have some left in the morning i may hit the eggs with it.
It is not good for large amounts, i have a coffee grinder too... but to make a little mix for one meal or one dish it is the bomb.
Mine is glass, glass mortar with a very fine grit in the bowl and a glass pestle also with a fine grit. I will get a coarser one probably granite when i find one at a decent price at one of the above stores.