The supplied research does not identify a Sandustry material or obstacle named Crackstone, so there is no verified Crackstone-breaking method to publish. The gameplay transcripts separately mention indestructible bedrock, thick ice, ordinary terrain, and tougher barriers that require better tools. Treating any of those as Crackstone would be guesswork, so the exact answer is 待确认 (to be confirmed).
Crackstone Is Not Named In The Sources
Neither the Steam store copy, the two storefront and news pages, nor the supplied gameplay transcripts use the term Crackstone. Because the target name is absent, its appearance, location, resistance, and required tool cannot be verified. Search results or community labels outside the provided material are not used on this page.
Bedrock Is A Separate Confirmed Material
One gameplay transcript uses the grabber inspection to identify bedrock and states that it cannot be destroyed in that recorded build. The same footage distinguishes bedrock from sand, soil, snow, ice, water, lava, and fluxite. That evidence does not prove Crackstone is bedrock, so no bedrock rule is applied to the unconfirmed term.
Ice Has Its Own Verified Solutions
Official descriptions say a flamethrower can punch through a thick wall of ice and suggest redirecting lava as another solution. The transcripts also show heat melting ice into water and a cryoblaster producing snow that can freeze water or solidify lava. These are verified ice and temperature interactions, not a confirmed answer for Crackstone.
Better Mining Tools Exist
The collected videos show ranged tools, upgraded weapons used for mining, and references to a rocket launcher for tougher excavation. Fluxite is shown as an upgrade resource, while research opens additional equipment and production technology. The sources do not connect any particular upgrade or launcher to an object called Crackstone, so that connection remains 待确认.
What Needs Official Confirmation
A reliable Crackstone guide would need an official material name, a confirmed location, the tool or reaction that affects it, and the relevant game version. None of those details appears in the supplied research. Until they do, the accurate guidance is to inspect the material in game and avoid confusing it with bedrock or ice.