Grand Blue Tempering Stone
Direct answerTempering Stone shows up in current community upgrade-material tables as a crafting/upgrade ingredient — the material-class answer is that it belongs to weapon/gear upgrade recipes (the same family as whetstone-class materials on grand-blue.online's crafting tables). What the stone actually does inside the game UI — which menu, which gear tiers, what it adds — is not yet reproducibly documented, so everything beyond "an upgrade material" is HOLD.
Quick answer
"What does Tempering Stone do?" Best current answer: it is documented as an upgrade material in craft/upgrade recipes for gear progression. What it isn't yet: a confirmed field — no menu location, no source, no effect numbers. This page ships with the questions split so the answer can be upgraded the moment live UI proof arrives.
What current coverage agrees on
| Field | Current claim | Status |
| Material class | Upgrade/craft ingredient (whetstone-class family) | grand-blue.online tables, 2026-10-21 check |
| Purpose | Gear/weapon upgrade recipes | Community coverage |
| Acquisition source | Unknown (no shop/drop/employer node published) | HOLD |
| Menu consumed in | Unknown | HOLD |
| Effect per use | Unknown | HOLD |
Where to use it (problem statement)
The obvious queues are the pickaxe ladder and weapon/equip upgrades — the same progression the Mining guide and the Weapons hub describe. But the pickaxe-ladder recipes we document are Lead-first (Lead Ore → Lead Ball → slingshot ammo), and no current coverage names Tempering Stone inside those chains. So the safe statement is: keep it if you upgrade gear; don't sell it before the tooltip is checked.
How this page gets resolved
- Capture the in-game tooltip or upgrade menu listing Tempering Stone with a date
- Trace where it drops, is bought or crafted
- Record the exact recipe units — then the table's HOLD rows flip to their real values
What we don't publish
No invented recipe ("2 Tempering Stone = +1 level"-style rows), no drop odds, no NPC assignment. Every high-risk field stays Unknown until a dated, reproducible source exists.
Last verified
Last verified: 2026-10-21. Evidence state: community for the material-class claim, official only for crafting/upgrade being a system, HOLD for everything else.