Harmonium

Harmonium expands Minecraft with its seamless additions.
Clean, well-tuned, and vanilla-like.

Harmonium:
Copper-type blocks can be mined with wooden tools instead of stone ones.
Copper nugget.
Tin ore.
Tin decorative blocks with unique sounds.
Tin soldiers.
Tin bulb with 15 light level modes.
Tin armor trim.
Bronze decorative blocks.
Bronze smelt.
Bronze ingot.
Bronze nugget.
Bronze tools.
Bronze armor.
Bronze armor trim.
Bronze horse armor.
Bronze armor equipping sounds.
Some mobs can spawn naturally in bronze gear.
Stone tools are no longer obtainable because of bronze tools. (can be toggled in config)

Farmers Delight:
Wooden knife.
Knives retexture.
Flint knife is no longer obtainable. (can be toggled in config)

Friends and Foes:
Unreliable tin button.
Long-pressing bronze button.

Geophilic:
Tin surface generation support.

Tin Update
— Close friend of copper! With unique armor trim, decorative blocks, and smart redstone bulb.

Bronze Update
— Stone tools replacement! New progression based of bronze tools and armor.

Steel Update
— Post-iron tools and armor.

Configuration?
Yes, some features of the mod is configurable.

Fabric port?
Only when all planned content will be done.

1.21.2+?
As soon as possible.

Discord server?
As soon as possible.

(it costs around a dollar)

Benefits:
Regular sneak peek updates.
Your feature-add requests.
Custom discord role and private chat.