If you destroy the demonite ore (rarer as diamond) you get a demonite. The Nightmare Pickaxe is one of the easiest items for a player to obtain that is a melee weapon and gives off particles. This is my Demonite Mod which will be updated with the rest of the ores As there will be one or two more. Comment by jjanchan Legion gems can be obtained by prospecting ore - namely Leystone Ore (common ore) and Felslate (uncommon ore).. An adjunctive source is from Boon of the Gemfinder, a shoulder enchant available from Veridis Fallon upon reaching Revered with Court of Farondis.The yield on this is too low to be a consistent and steady source, however. Ore spawning Pre-hardmode. Demonite ore, for example, is primarily obtained by defeating the Eye of Cthulhu and the Eater of Worlds. You can craft a armor, tools and weapons and much more out demonite and a new weapons it calls Battle Axe. Crimtane/Demonite Ore I have nearly 400 hours in the game and after running into it very very rarely, I started to wonder, why does it even naturally spawn at all?

is it worth it's wait gold? No, it is not possible to obtain hellstone without having demonite/crimtane ore. Cobblestone Stick Demonite Tools Demonite Armor Demonite Blocks Ores are various types of minerals that can be found and mined throughout the world, including the underground and on the Floating Islands.All ores are mined using a pickaxe (though not all pickaxes will work on all ores) and smelted at a Furnace, Hellforge or Adamantite/Titanium Forge.. Platforms PC, PlayStation 3, Xbox 360, iPhone, Android, PlayStation Vita, PlayStation 4, Xbox One, Nintendo 3DS, Wii U, Nintendo Switch

I've only ever seen veins of about 3-4 maximum together, definitely not enough to be able to use, and you get tons of it from the eye of cthulu/eater/brain. Since you said you've beaten the Eye of Cthulhu, you should have access to the Dryad. The demonite/crimtane tier pickaxe is the only way to obtain hellstone. The particle effect given off by this tool are extremely similar to the particles that are emitted from Demonite Ore and Shadow Orbs. Additionally, the enemies in hell are a lot more dangerous than those found in the corruption/crimson. Ores are an in-game item that can be obtained from mining ore mines. “Hermes” brought that strange ore to “Hazel” the famous Core Alchemist of Pastur continent, he found out that the ore contained an outrageous force, and he created a new gem with the purple colour, they decided to name it as “ Demonite ” as “Hermes” suggested.

You have to smelt the demonite in a furnace, than you get a demonite ingot. And finally, Luminite ore (the strongest in the game) can only be obtained by defeating Moon Lord.