Obsidian is one of the key Epic ores in Roblox’s The Forge. It’s rare, it only drops from a specific rock type, and it powers some of the best late-game armor thanks to its strong defensive trait.

Getting it consistently is less about luck and more about going to the right place with the right tools and expectations.

Where Obsidian comes from in The Forge

Obsidian is an Epic ore that drops only in the Forgotten Kingdom region. It does not appear in Stonewake’s Cross or Goblin Cave.

Property	Value
Location	Forgotten Kingdom (Volcanic area)
Source rock	Volcanic Rock
Rarity	Epic
Drop chance	1 / 333 from Volcanic Rock
Sell price	$35.25
Forge multiplier	2.35x
Armor trait	+30% extra defense / +30% max health (trait applies only on armor)

All of this makes Obsidian a mid–late game ore: common enough to realistically farm, but rare enough that you need a focused route to gather it in useful quantities.

How to reach Volcanic Rock for Obsidian

Obsidian only drops from Volcanic Rock in the volcanic section of the Forgotten Kingdom. Reaching it follows a consistent path through that region’s cave network.

Travel to the Forgotten Kingdom. Use your usual route or portal access; this is the only region where Volcanic Rock spawns.

Enter the Ruined Cave within the Forgotten Kingdom. This cave connects the main area to the deeper volcanic zone.

Image credit: FireAtacck/Roblox (via YouTube/@iiCYRENii)

Keep moving forward through the Ruined Cave until you reach the Volcanic Depths. Visual cues shift to dark lava rock, glowing pools, and more intense lighting.

Look specifically for Volcanic Rock nodes. These stand out from Basalt rocks and veins and are the only rock type that can drop Obsidian.

Only Volcanic Rock can give Obsidian. Other Forgotten Kingdom rocks like Basalt Rock, Basalt Core, or Basalt Vein never drop it.

Pickaxe and stats needed to mine Volcanic Rock

Volcanic Rock is one of the tougher node types in the game. Technically, weaker pickaxes may be able to damage it, but the mining speed becomes so slow that farming is impractical. A stronger pickaxe makes a huge difference.

Upgrade to at least a high-tier midgame or late-game pickaxe before focusing on Obsidian. Players commonly use picks on the level of Lightite or Arcane to mine Volcanic Rock comfortably.

Boost your luck stat if possible. Higher luck does not change the base 1/333 rarity number, but it increases the effective chance that a rare ore appears when a rock rolls its loot.

Consider mining-focused buffs such as potions, totems, or a mining-oriented race. These effects help you break rocks faster and generate more ore rolls per minute.

Better pickaxes do two things at once: they reduce the time per Volcanic Rock, and they let you clear larger areas quickly so you can cycle spawns and see more rocks overall.

Efficient Obsidian farming route and mindset

With a 1/333 base drop chance, Obsidian is statistically rare. The most important thing is to maximize how many Volcanic Rocks you break per session.

Once in the Volcanic Depths, pick a loop that passes through the highest concentration of Volcanic Rock. Many players settle on a route that circles the main lava chamber and any connected side tunnels with multiple rocks.

Break every Volcanic Rock you see, even if you only want Obsidian. These nodes can also drop other valuable ores like Topaz, Cuprite, Rivalite, Fireite, Magmaite, and more, which you can sell or forge.

After clearing your loop, repeat it. By the time you return to the starting point, rocks usually respawn, giving you another set of chances for Obsidian.

Plan for longer sessions. With a 1/333 chance, even multiple full loops may not yield Obsidian immediately. Treat it as a long farm and focus on the overall ore haul instead of each individual node.

Patience is essential here. The volatility of RNG means you might see Obsidian in the first dozen rocks or not at all for a while, even though the long-term average aligns with the drop rate.

Why Obsidian is so good on armor

Obsidian is primarily an armor ore rather than a weapon ore. Its standout trait is a large defensive bonus that only applies when it is used in armor forging.

Trait effect: +30% extra defense / +30% max health on armor, depending on the description used in-game.
Scope: The trait applies only when Obsidian is part of an armor recipe. It does not add its defensive bonus to weapons.
Stacking: The health/defense buff stacks with other sources of survivability, such as Mythril or Uranium traits and other mechanics that increase max HP or damage reduction.

This makes Obsidian central to tank-heavy builds and late–game survivability setups, especially when combined with high-tier armor bases and other defensive ores.

How much Obsidian to use when forging armor

Forging in The Forge mixes ores to determine both the item type and the trait chances. Obsidian contributes its defensive trait when it makes up a meaningful portion of the armor recipe.

Aim for at least a small share of Obsidian (around 10% of the total ore count) if you simply want a reliable chance to get its trait on the armor piece. At this level, you can still mix in other trait ores like Mythril, Uranium, or Eye Ore.

Increase Obsidian to roughly one-third of your total ore stack (about 30%) when you want to strongly favor its defensive trait over others. At that concentration, Obsidian’s buff typically becomes the dominant armor trait.

Fill out the rest of the recipe with complementary defensive ores. Common pairings include Mythril for additional flat defense and Uranium for area-of-effect damage tied to your HP, creating a build that is both tanky and punishing for nearby enemies.

For example, a high-end tank chestplate might use a mix of Obsidian, Mythril, Uranium, and Eye Ore to combine raw health, defense, and some offensive trade-offs.

Example high-end armor recipes using Obsidian

Obsidian features in some of the strongest Heavy armor setups in The Forge, especially when paired with other late–game ores.

Heavy Chestplate focus: A typical late-game recipe uses a large batch of Obsidian alongside Mythril, Uranium, and Eye Ore. This combination leans into max HP, armor defense, and conditional damage, with a high chance to roll a Heavy Chestplate and strong vitality bonuses.
Heavy Leggings for mobility tanks: Swapping some Uranium for Lightite while keeping Mythril and Obsidian in the mix produces Heavy Leggings with both high vitality and bonus movement speed, giving a tank build more mobility.

The exact percentages and outcomes depend on the Forge Chances interface and your ore ratios, but Obsidian remains the core defensive anchor in these recipes.

When to sell Obsidian instead of using it

Obsidian sells for $35.25 per ore, which is good for an Epic ore but not the top of the tier. Ruby and Rivalite, for example, sell for more per unit.

Use Obsidian for forging when:

You are actively pushing for late–game armor or survivability.
You have enough Mythril/Uranium stock to support defensive builds.
Your current armor is clearly weaker and you will feel the 30% defensive bump immediately.

Consider selling Obsidian when:

You are early in progression and cannot yet reach traits or recipes that fully exploit it.
You urgently need gold for key upgrades such as a better pickaxe or essential potions.
You already have several Obsidian-based armor pieces and extra copies are unlikely to change your build.

Because Obsidian is relatively rare and strategically valuable, it generally pays to keep at least a small reserve for future armor projects rather than liquidating every piece.

Once you can reliably reach the Volcanic Depths with a strong pickaxe, Obsidian stops being a mysterious drop and becomes a predictable output of your mining loop. Treat Volcanic Rock as your main target, accept the low drop rate, and use the ore thoughtfully in armor recipes that lean on its powerful defensive trait.