Ever notice the strange shiny ore in your inventory when mining? You may have stumbled across something we call a 'Crystal'. These strange gems are used for Advanced Crafting in the Survival, Slimefun, and Skyblock servers.
Crystals can be found from mining their respective ores in the resource world of Survival or Slimefun. Due to a lack of resource world for Skyblock, you can obtain them from your cobblestone generator on your island. When mining for these crystals, there is a 1% chance of receiving them from the ore you are mining. Ore references are shown below...
Redstone Ore -> Bloodstone
Lapis Ore -> Sapphire
Diamond Ore -> Alexandrite
Emerald Ore -> ColoShite
Although you could trade, sell, or purchase these crystals from other players, their main purpose is for crafting powerful tools in the Advanced Workbench menu. To access this menu, crouch-click a regular crafting table, and the Advanced Workbench GUI will appear.
An example of the Advanced Workbench GUI (Style of GUI varies on texture pack being used)
From this GUI, you can craft powerful items as if it were a normal crafting table, by dragging and dropping the required items into the respective 3x3 grid and taking the output item. You could also select the custom head named 'Advanced Recipes' to take a look at what you can craft/what materials you need to craft.
I hope this tutorial has helped you learn a little more about Advanced Workbenches and Crystals!
Enjoy DogeCraft! -Joey