Architect's Palette adds many new blocks. They are awesome and look super cool. The recipes are generally balanced to be survival friendly, with high yields and common ingredients. There's a config and Quark support. The mod is good I swear.
Off the top of my head, there are blocks like...
- Fish blocks with scales
- Industrial metal plating
- Bricks made of bones, and a dark set made of withered bones
- Glowing crystals growing in the Nether
- Stone bricks made with ores, which the artists want to get rid of, but the community is oddly attached to so they're in a strange purgatory where we can't really get rid of them but really don't want to support them which is why there isn't a copper variant (please don't ask for a copper variant)
- Brick variants of some blocks that don't have brick variants (like basalt)
- Charcoal blocks made by smoking logs (in a smoker), much to the distaste of everyone who has ever seen the recipe.
- Original materials like Sunmetal, Olivestone, Cerebral Plating, and Abyssaline
- "Mossy" (Nether vine-y) Blackstone variants that were also implemented in Quark (we did ours first)
- A new crafting mechanic to facilitate some weirder materials such as Esoterrack and Twisted trees (it shows up in JEI and is datapack friendly)
- Incredible Board blocks that are just big planks
- Nubs, a new block shape used for shape detail in builds
- Incredible Heavy Bricks that are just big bricks
- Cute Acacia totems