Marble is a 50/50 byproduct of the “Obsidian and Marble” recipe in the Advanced Athanor: 2× Oblivion Essence + 1× Shattered Crystal → 1× Obsidian (50%) or 1× Marble (50%), 6 seconds per craft. Nothing in the current recipe index consumes Marble, so it is a decoration and building material, not an ingredient.
The exact recipe
| Field | Value | Evidence |
|---|---|---|
| Device | Advanced Athanor | DATAMINED |
| Input | 2× Oblivion Essence + 1× Shattered Crystal | DATAMINED |
| Output | 1× Obsidian (50%) or 1× Marble (50%) | DATAMINED |
| Craft time | 6 s | DATAMINED |
| Recipe name in the list | “Obsidian and Marble” | DATAMINED |
Why you keep getting Obsidian instead of Marble
The Advanced Athanor lists two recipes with identical inputs:
- Obsidian and Marble → Obsidian 50% / Marble 50%
- Obsidian and Volcanic Ash → Obsidian 50% / Volcanic Ash 50%
If your machine is set to the Volcanic Ash variant you will never see Marble, no matter how long it runs. Select the recipe by name in the device panel before you feed the line — this is the single most common reason players report “Marble does not drop”.
The official 1.0 patch notes made the same change from the other direction: the Obsidian byproduct was moved from Volcanic Ash to Marble. Both variants now exist side by side.
Where the two inputs come from
| Input | Source | Time | Evidence |
|---|---|---|---|
| Oblivion Essence | Paradox Crucible: 1× Sage Seeds → 1× Oblivion Essence | 8.7 s | DATAMINED |
| Shattered Crystal | Refiner: 2× Dull Shard → 1× Shattered Crystal | 3 s | DATAMINED |
Sage Seeds cost 360 copper at the purchasing portal, so a bought-essence Marble works out to roughly 720 copper of essence plus a Shattered Crystal per attempt — and only half the attempts land. Feed the Athanor in batches and let the Obsidian half go to jewellery rather than hand-crafting one Marble at a time.
Three things that go wrong
- Wrong variant selected. Check the recipe name, not the input icons — they are identical.
- Feeding by hand. A 50% roll needs volume. Put the Athanor on a conveyor line and buffer the output chest.
- Expecting a crafting use. Marble is not an ingredient in any indexed recipe; it is a solid building material. See cauldron recipes for the conversions that actually feed production.
Recipe, inputs, split and craft time: DATAMINED from game build 1.1.5024. The Volcanic Ash → Marble change: OFFICIAL 1.0 patch notes. Buying price of Sage Seeds (360): DATAMINED. Nothing here is estimated.
Independent fan reference for Alchemy Factory. Game data refers to the current official 1.0 build (Steam, PC). Field-level evidence is flagged on each page with OFFICIAL / OBSERVED / COMMUNITY badges; amounts shown without a badge come from the official 1.0 patch notes or store descriptions.