How to Find Ore Veins in Gregtech CEu Modern

Finding ore veins in Gregtech is one of the first and most crucial tasks you’ll undertake in this mod. Unlike vanilla Minecraft where ores are scattered individually throughout the world, Gregtech generates ores in large, concentrated veins that contain massive amounts of material. This guide will walk you through the process of locating these valuable ore deposits and explain how ore generation works across different Gregtech versions.

Important Modpack Variations

Before you begin your ore hunt, it’s essential to understand that some modpacks alter Gregtech’s default ore generation. For example, ATM9 (All The Mods 9) has moved ore veins to the mining dimension, meaning you won’t find them in the overworld. Other modpacks may have made similar changes. This guide focuses on the default Gregtech ore spawning mechanics as they appear in Gregtech New Horizons, Gregtech Community Edition, and Gregtech Community Edition Modern—the spawning system works essentially the same way across all three versions.

Enabling Chunk Borders

The most important tool for finding ore veins in Gregtech is enabling chunk borders. Chunk borders help you visualize the 16×16 block chunks that Gregtech uses to distribute its ore veins systematically.

To enable chunk borders, press F3 + G on your keyboard. The “G” stands for “Gargantuan,” referring to the massive veins from Gregtech. Once enabled, you’ll see clear grid lines overlaying your world, making it much easier to navigate and search methodically.

Understanding Ore Vein Distribution

Gregtech ore veins spawn in a predictable pattern: there is one ore vein every three chunks. This means if you find an ore vein in one chunk, the next vein will appear three chunks away in the same direction. For example, if you find an ore vein in chunk 1, you’ll find another in chunk 4, then chunk 7, and so on.

Using Journey Map or similar waypoint mods, you can mark your first discovered vein and plan your search pattern accordingly. However, finding that initial vein requires some exploration and patience.

How to Search for Your First Ore Vein

Finding your first ore vein is often the most challenging part of the process because you don’t know which chunks contain veins. Here’s the most effective approach:

Navigate to the middle of a chunk (ideally the exact center block)

Dig straight down from surface level

Continue this process in different chunks until you discover an ore vein

If your modpack includes tools like a hammer that can mine a 3×3 area, use it—this will significantly speed up your search process. Alternatively, you can perform strip mining horizontally through chunks, though vertical mining from the surface is generally faster for beginners.

What Ore Veins Look Like

When you find a Gregtech ore vein, you’ll immediately recognize it. Unlike vanilla Minecraft where ores are scattered sparsely throughout stone, Gregtech veins are absolutely massive—containing enormous quantities of a specific ore type. You might find rock salt, spodumene, or other ores concentrated in one location, with ore blocks covering a huge area.

The abundance of ore in a single vein is one of the defining features of Gregtech ore generation and is intentional by design. Once you spot even a single ore block from a Gregtech vein, you’ve found the vein. Start digging around it, and you’ll quickly uncover the full deposit.

Mining Depth Considerations

Ore veins in Gregtech can be found at various depths, which varies by Gregtech version and Minecraft version. For example, this guide is demonstrated on Minecraft 1.20, while Gregtech New Horizons is still on version 1.7. When mining, you may need to dig quite deep—sometimes all the way down to deep slate layers—to find certain ore types.

If you come down through only a single block and miss the ore, you might not detect the vein. This is why mining a 3×3 area vertically or performing strip mining through chunks is recommended. For instance, deep slate redstone ore might only be partially visible from one angle, but as soon as you expose more blocks, the massive vein becomes obvious.

Using Gregtech Documentation

To make your ore hunting more efficient, consult the official Gregtech Modern documentation website. This resource lists all available ore veins and their properties, including:

Cassiterite Vein: Contains tin and cassiterite, found between Y-levels 10 to 80

Copper Tin Vein: Contains copper and tin

Galena Vein: Contains galena, silver, and lead

Garnet Tin Vein: Contains specific minerals as listed

Mineral Sand Vein: Can contain gypsum and other materials

Each vein type has specific Y-level (height) ranges where it can spawn. If you’re searching for a particular ore, you can reference this documentation to find which vein type contains it and at what depth it might appear. Similar documentation may exist for older Gregtech versions as well.

Finding Specific Ores

Unfortunately, there’s no easy, guaranteed method to locate specific ore types early in the game. Finding ore veins largely comes down to luck and systematic searching. The best approach is to spend a few in-game days exploring different chunks and mining various ore veins you discover. Over time, you’ll encounter the ore types you need and can mark their locations for future reference.

Different veins spawn at different height ranges, so if you’re struggling to find a particular ore, try mining at different depths. Keep notes of what you find and where, and use your waypoint system to track valuable vein locations for your survival world.

Summary

Finding ore veins in Gregtech requires patience, systematic searching, and understanding the mod’s vein generation system. Enable chunk borders with F3 + G, search methodically through chunks by digging down or strip mining, and look for the characteristic massive ore deposits that indicate a Gregtech vein. Once you find your first vein, use the three-chunk spacing pattern to locate additional veins more efficiently. Reference the official Gregtech documentation to understand which ores appear in which veins and at what depths. With these strategies, you’ll be well-equipped to gather the ore you need to progress in Gregtech.

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