Freaking Soft Tissue, I accidentally picked one up, probably dropped from dead Dverger Rogue, otherwise I wouldn't even know this item exist, and it stay at one until I need more and need to googling it because I didn't accidentally find it like other item. "It still fizzes softly with ancient memories" as a hint? I didn't even recognize there's the head part of the freaking "Petrified Bone". Why not named it something like "Giant Remains" or "Petrified Giant Remains" or some easier ♥♥♥♥. Even then I wouldn't even think about mining the head part until I exposed the inside because there's not much use for the Black Marble at all. I mined one piece of ribs and that's it for the rest of the biome because the recipe is still lock behind some convoluted hoop for me to jump through before I can unlock some of recipe with it, and even when you unlocked it, you'd only need like what, 20? 30? at most. That's only about 2-3 piece of ribs, unless you're a base builder you're not gonna exhaust the resource and exposed the soft tissue inside. Maybe remove the ribs and leave only the head part, so people can accidentally discover it easier, or make it spawn already exposed, or change the whole name and hint thing, if you want people to figuring out word puzzle in a this kind of game.