Fabric Furnaces is my take on the furnace version of the popular mod Iron Chests. It adds in new furnaces based on vanilla materials that scale in speed & ability. Fabric Furnaces is made for 1.14 Fabric; it requires the Fabric Loader & Fabric API.
Crafting recipes are progressive and can be seen here:
To craft Crystal variants of the furnaces, surround them with 8 glass.