Hi! How are you?

I have a question about the mod. What mod do you recommend for the amethyst, copper, platinum furnaces? I haven't found any mods and I wanted to use them in my world. I hope not to bother!

Hello, I'm fine, and you?
You can simply use in version 1.16.5 the official
Ultimate Furnaces addon available in curse forge https://www.curseforge.com/minecraft/mc-mods/ultimate-furnaces-bfr

Oh yes, i have the ultímate furnaces but i cant craft that furnaces. Which mod do you recomended to craft them?

Ah, now I understand you well, you can use Mekanism or/and Silent Gear with some addons like Silent Mechanisms and Silent Gems