There are 2 types of powdered, clay type materials used in kintsugi.
Jinoko is a powder and is a rougher grain. Tonoko is a mass and is a finer grain.
Tonoko has to be smashed to be used. The material itself is a finer mesh than jinoko although it looks like it is rougher since it comes in rock-like masses.
You use tonoko for making a mix called abura tonoko which is used for polishing graded metals. Graded metals are the rougher grades that start at #1 and go to #15. You don’t use tonoko for polishing the fine gold powder. You also use tonoko for making a mix called sabi which is used to do restoration work. It is mixed with water first and then lacquer.
There are many ‘recipes’ for sabi. I don’t use any types of set proportions but I have seen 2/tonoko to 1/water to 1/lacquer.
You use jinoko to make your sabi stiffer if you like. That is, if you are doing restoration work you can add jinoko to the mix and since it is rougher it will be a stronger mix although it will also be rougher since jinoko is rougher than tonoko.