How to Easily Find Arcane Crystal & Rainbow Crystal The Forge Roblox!

Finding the rarest ores in The Forge can feel impossible, especially when their drop chances are so low. But with the right prep, the right spot, and the right technique, you can boost your chances and farm them faster. This guide explains how the system works, why these crystals are so valuable, and the farming method most players use to finally get them. Also check out our Roblox The Forge Beginner Guide for those interested and the Race Tier List.

What Are Arcane Crystal & Rainbow Crystal?

Arcane Crystal

• Rarity: 1 in 100,000
• Considered the rarest ore in the entire game
• No special status effect
• Extremely high multiplier
• Mostly obtained through extreme luck

Rainbow Crystal

• Rarity: 1 in 5,000
• Used to craft items like Rainbow Sword and Rainbow Armor
• No status effect, but has a solid multiplier
• Popular for builds, collection, and index completion

Even without bonus effects, both crystals have strong prestige value. Completing your index with them is considered a major achievement.

Before You Start: Prep Your Luck Buffs

To increase your farming efficiency, make sure every luck boost is active:

• Angel Buff: +30% Luck
• Achievement Luck: up to +40%
• Luck Potion
• Totem (optional but helpful)
• Pickaxe with Luck Bonus

The more luck you stack, the faster the crystals cycle.

Best Farming Location: Goblin Cave

Goblin Cave is currently the most consistent area for crystal spawning. When you mine rocks in this cave, they can turn into different materials:

• Core
• Basalt Core
• Basalt Rock
• Crystals

The main goal here is to use crystal respawns to your advantage. This area allows you to cycle crystals repeatedly without changing spots.

Main Method: The “Half-HP Reveal” Technique

This is the method players used to successfully pull Arcane Crystals after long grinding sessions.

1. Find 2–3 Crystals Close Together

More crystals = faster cycles. Ideally, choose a cluster so you can rotate between them.

2. Hit Each Crystal to Half HP

When a crystal reaches 50% HP, its color reveals what type it is.

Color results:

• Red → skip
• Blue → skip
• Green → skip
• Purple → skip

If the crystal is not Rainbow or Arcane, leave it alone and let it respawn naturally.

3. Repeat the Process

Every respawn creates a fresh roll. Keep repeating the cycle to increase your chances of triggering:

• Rainbow Crystal (1/5,000)
• Arcane Crystal (1/100,000)

This method takes patience and consumes multiple potions, but it remains the most reliable strategy available.

Extra Tips to Boost Your Chances

Use these to speed up your grind:

• Combine all luck buffs at once for maximum effect
• Farm with friends to increase total crystal spawns
• Break ores you haven’t indexed yet — each index gives bonus XP and gold
• Don’t expect instant results — even experienced players spend hours farming for a single Arcane Crystal

Special drops rely heavily on RNG, so consistency is key.

What Can You Craft with Arcane or Rainbow Crystals?

In The Forge, these crystals allow you to craft high-value items such as:

• Crystal Sword
• Crystal Gauntlet
• Crystal Armor

Players also craft prestige builds like:

• Rainbow Sword
• Arcane Armor
• Rainbow Gauntlet

These items are mostly for flexing your collection rather than dominating battles.

Getting an Arcane Crystal or Rainbow Crystal is one of the rarest achievements in the game. With the half-HP reveal method, stacked luck buffs, and the right farming location, your chances go up, even though RNG still plays the biggest role. If you’re aiming to finish your index or just want exclusive gear for collection value, this method is your best route. Stay patient, stay prepared, and good luck with your grind in The Forge.