The Increased Density Mod

What it currently adds:

Packing and unpacking cobblestone up to five times
Sapphire
Thermoelectric Alloy
Osmium
Steel
Alluminum
Blue Gold
Purple Gold
Phosphorus (Furnace fuel only)
Tungsten
High Speed Steel
High Carbon Steel
Block versions of all materials
Coins that can be used for currency on minecraft servers

Images of the mod:

PS:

This mod is only a hobby but I am actively working on it