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In Circle Grinding Incremental onRoblox, you’ll work through several systems that multiplicatively boost one another through some very intense mathematics. Each system is finished once it’s completely automated, and so you move on to the next one - but there is one system that this rule doesn’t apply to: the cave system.
The caves are used from very early in the game, and have content for each system after they’ve been unlocked, meaning it’s an ever-important space you should have your eyes on. It is a very complicated system, so this guide aims to answer your questions and guide you through everything they offer.

What Are The Caves?
The caves are a system youunlock when upgrading to Tier 2 - String. There are very few missions that are related to the caves, so, for the most part,the caves are completely optional- though, that isn’t to say that they should be ignored.
Your objective in the caves is tomine blocks and ores, and these can then besold for coins. Each cave you unlock has upgrades you can unlock by either:

Each cave also hasan index of ores, sorted by rarity. Once you find and break an ore, it’s unlocked in the index, and you gain apermanent +10 percent coin boost per ore. Ore rarities are the same for each cave, and each index usually has the same number of ores per rarity, as follows:
Per cave, ores of that rarity

Four or five
Always three

Two or three
One, two or three

???
One or two

Always one
Every Cave In Order
To unlock each subsequent cave, you’ll need tounlock it elsewhere in the game first. This can be done in a couple of ways, but progressing through the main gamealways guarantees you’ll eventually unlock the next stagein the caves. Once unlocked, you’ll also need aPickaxe Power level high enoughto be able to break the blocks blocking the entrance to the next cave.
There are12 caves in total.
First Cave, Dirt
This is the first cave you unlock, and the basic block here is Dirt. There arethree upgrades:
1,000 (x10,000 Prestige Points)

Increases the Prestige Points you get.
The Better Pickaxe upgrade isrequired for progressand is thereforethe most important upgradein the entire Mine. Faster Walking isn’t important at first, butbecomes crucial once you’ve got a lot of cavesto walk back and forth through.
Second Cave, Hard Dirt
The basic block here is Hard Dirt, and there arethree upgrades:
Jackhammer
38 (10 percent)
Chance to deal x2 of your damage when a block is mined to the entire layer.

Increases the Diamonds that can exist at once.
Third Cave, Harder Dirt
The basic block here is Harder Dirt, and there arethree upgrades:
12 (36 percent)

25 (2.3 seconds)
Increases the Speed that blocks regenerate with.
Faster Block Regeneration can help immensely when aiming for very rare ores, so try to upgrade this one as much as you can.
The basic block here is Rock, and there arethree upgrades:

20 (^0.36 decay)
Slows the rate at which the Combo decreases.
Fifth Cave, Hard Rock
The basic block here is Hard Rock, and there arethree upgrades:
30 (nearly instant)
A mining laser automatically mines blocks. (Levels decrease cooldown.)
Explosion Chance
36 (10 percent)
Chance to deal x4 of your damage in a 3x3x3 radius after a block is mined.
Backpack is arguablythe second most important upgradein the caves, as it boosts your income by orders of magnitude, andmakes progress in later caves possible. This and Better Pickaxe should always be atthe maximum level you may afford.
Sixth Cave, Harder Rock
The basic block here is Harder Rock, and there arefour upgrades:
20 (2 percent)
65 (x4.25 Electricity)
100 (100 percent)
The basic block here is Obsidian, and there arefive upgrades:
Block Breaker
29 (23.5 percent)
Chance to deal x30 damage to a block within a 10-block radius when you break a block.
18 (26 percent)
5 (9 radius)
Increases the Radius of the Laser.
Focus on Auto Mining Upgrades here, as it’ll boost your other systems a lot without you having to worry which upgrades you missed.
Eighth Cave, Molten Obsidian
The basic block here is Molten Obsidian, and there aresix upgrades:
15 (23.9 percent)
4 (20 percent)
5 (5 radius)
20 (x1.049e6 Xplacement Points)
20 (38 percent)
The basic block here is Lava, and there arefive upgrades:
Nuke
100 (0.125 percent)
Chance to clear out an entire Cave with x2000 your Damage.
10 (+5 percent)
29 (14.5 percent)
Increases the chance of Block Breaker.
Tenth Cave, Radioactive Rock
The basic block here is Radioactive Rock, and there arefive upgrades:
8 (4 radius)
Ore Walker Interval
15 (64.9 ms interval)
Increases the interval at which ore walker breaks the ores below you.
25 (50 percent)
Ore Breaker
2 (x1.4 chance)
Block breaker has a 20% higher activation chance when you mine ores.
Increases the Radiation you get.
Eleventh Cave, Toxic Obsidian
The basic block here is Toxic Obsidian, and there arefour upgrades:
100 (10 percent)
20 (5 radius)
Sky Walker Interval
Increases the interval at which sky walker breaks the ores above you.
18 (18 percent)
Increases the chance for a laser strike to activate abilities.
Twelveth Cave, Toxic Lava
The basic block here is Toxic Lava, and there arefour upgrades:
30 (0.15 percent)
9 (240 Blocks per second)
20 (15 seconds)
50 (60.8 percent)