Jinoko and tonoko 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 can’t use tonoko for polishing the fine gold powder called keshifun. You use jinoko 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 set proportions to mix sabi but I have seen suggestions of 2/jinoko to 1/water to 1/lacquer.
You use more jinoko to make your sabi stiffer if you like. That is, if you are doing restoration work you can add more jinoko to the mix and it will be a stiffer mix. If you use tonoko for mixing sabi often it will shrink more and crack requiring an additional applications to fill those cracks.