Bombs were added to Mine a Mountain in the July 3, 2026 update. There are 8 unique bombs — Classic, Wind, Ice, Fire, Thunder, Poison, Time, and Agony — each tied to a rarity tier and bought at the Bombs Shop at spawn. The shop restocks on the same hourly cycle as the mountain. A bomb only breaks a vein whose tier is at or below its own; a weaker bomb bounces off a higher-tier vein and drops nothing. About 18% of a bomb’s crystal drops are vein artifacts, and bombs are the main way to get crystal mutations. The top tier is the Agony Bomb at $600M.
How Bombs Work
Bombs are the tool you use to open veins — the rare ore deposits buried inside the mountain’s rock. Unlike surface crystals, veins can only be broken open with the correct bomb, and each vein type drops from its own exclusive crystal pool.
The key rule is the bomb tier ladder. A bomb breaks any material whose tier is at or below its own tier, and no higher. So a bomb that is strong enough destroys the vein and drops crystals from that ore’s exclusive pool. A bomb that is too weak simply bounces off the higher-tier vein and drops nothing, so you lose the bomb.
That “explode on the right vein” decision is the core of the trick. A bomb you can’t use effectively on a high-tier vein is wasted, while a strong bomb used on low-tier rock is safe but often not worth its price. Reading the mountain and matching bomb to vein is usually more valuable than just buying the most expensive bomb you can afford.
About 18% of a bomb’s crystal drops are vein artifacts pulled from that ore’s exclusive artifact pool; the rest are normal crystals. Bombing veins is the only way to obtain artifacts (to be confirmed — this figure is sourced from the wiki and may shift with updates). Note that vein artifacts are built larger than normal crystals, though their cash value is capped to keep them modest; their real strength is the luck they bring to your run.
Every bomb except the Classic and Wind types also spawns mutated crystals in its blast. That mutation boosts the sell value and luck of the affected crystals, which is why the bombs wiki describes bombs as the main way to obtain mutations on crystals.
A few bombs leave a signature crater shape: the Time Bomb leaves a sundial, the Agony Bomb a rift, the Thunder Bomb a forked mark, and the Poison Bomb an acid basin.
The 8 Bombs and Prices
Bombs are bought at the Bombs Shop, located at the spawn. Prices and blast radius below come from the community wiki’s bomb table.
| Rarity | Bomb | Price | Blast radius |
|---|---|---|---|
| Common | Classic Bomb | $50,000 / 15 Robux | 14 |
| Common | Wind Bomb | $400,000 / 25 Robux | 14 |
| Uncommon | Ice Bomb | $2,000,000 / 45 Robux | 16 |
| Uncommon | Fire Bomb | $5,000,000 / 75 Robux | 16 |
| Rare | Thunder Bomb | $15,000,000 / 199 Robux | 24 |
| Epic | Poison Bomb | $40,000,000 / 299 Robux | 16 |
| Legendary | Time Bomb | $175,000,000 / 499 Robux | 22 |
| Mythic | Agony Bomb | $600,000,000 / 1499 Robux | 28 |
In-game, each entry is a cash cost plus a Robux component; Classic to Fire are cheap and common, while the higher tiers carry a much larger Robux price on top of cash.
The video guide describes the drops in gameplay terms: the Ice Bomb freezes the blast zone into a glacier and drops guaranteed frost crystals; the Fire Bomb makes the crater molten and creates fireborn crystals; the Thunder Bomb strikes with lightning and drops thunder crystals worth double; the Poison Bomb creates poison crystals that grow in value and infect nearby drops with the same corruption; the Time Bomb creates a giant clock face and drops the second richest crystal pool in the game.
The Agony Bomb is the mythic top tier. Its crater is described as a rift, and its blast radius is the largest at 28. The community video describes it as tearing the mountain open and raining only legendary and mythic crystals. See the Agony Bomb page for a full deep dive.
The Bombs Shop and Restock
The Bombs Shop sits at the spawn. Players buy bombs there using cash earned from selling crystals, so the shop is the bridge between your mining economy and the bomb you can afford.
The shop restocks on the same hourly cycle as the mountain RNG — roughly once per hour, matching the mountain reset. Players can also pay 79 Robux per restock to instantly skip the restock timer instead of waiting. As with all live Roblox content, the exact cost and cycle can change with an update.
Practical Usage and Upgrade Path
The clearest community advice, from the video guide, is an experience-based upgrade path rather than a fixed formula: buy the best bomb you can afford, use it to clear mountain sections faster, sell the valuable crystals you bring back, and keep progressing toward stronger bombs. The Agony Bomb is the top-tier goal, but Thunder, Poison, and Time are described as big steps before you get there.
A share of this is opinion. Which bomb is “best” or most profitable is a community judgment with no authoritative return-on-investment numbers, so treat recommendations as advice rather than guarantees. That said, a few practical principles follow from the mechanics: always match a bomb to a vein you can actually break, because a weak bomb on tough rock is wasted; save the strongest bombs for the highest-value veins, since artifacts and mutations only come from bombing veins; and keep upgrading the pickaxe and clear-speed side of your run, because selling valuable crystals fast is what funds the next bomb.
Common Mistakes and What Is Still Unconfirmed
Bombs are recent content — they were only introduced on July 3, 2026 — so values, prices, and effects can change with future updates. Please verify against the current game version before relying on a number.
There are no authoritative ROI figures published for any bomb. A fan community site offers a Bomb ROI calculator as an auxiliary tool, but the “best bomb for profit” recommendations you see are experience-based, not measured. We have not verified a single bomb as objectively most profitable, and we flag those suggestions as opinion. The professional guide that ranked bombs (sportskeeda) was blocked by Cloudflare during our research, so we only have its search snippet rather than the full page; treat any ranking from it as weak.
As of Aug 21, 2026, the values above reflect the community wiki. Numbers are subject to change.
Sources
- Bombs, Mine a Mountain Wiki (Fandom) — https://mine-a-mountain-roblox.fandom.com/wiki/Bombs
- All Bombs in Mine a Mountain (sportskeeda) — https://www.sportskeeda.com/roblox-news/all-bombs-mine-mountain
Frequently asked questions
How do bombs work in Mine a Mountain?
Bombs are bought at the Bombs Shop at spawn and used to break veins. Each of the 8 bombs breaks a vein of its own tier or lower; a weaker bomb bounces off a higher-tier vein and drops nothing. Bombing veins is the only way to get artifacts and the main way to get crystal mutations.
Can a bomb break any vein?
No. A bomb only breaks a vein whose tier is at or below its own tier. A weaker bomb bounces off a higher-tier vein and drops nothing.
What is the best bomb in Mine a Mountain?
The Agony Bomb is the top-tier Bomb at $600,000,000. Which bomb is best for profit is community opinion with no authoritative ROI numbers, so treat it as advice.