Ceramics, stones and mineral materials
Ceramics, stones and minerals are hard, brittle and abrasive: the materials that “talk back” to the machine the most. They engrave and mark better than they cut, and they wear tools out fast.
How to read the table
Laser — usually “Yes” for engraving/marking and “No” for through cutting: the material engraves but doesn't cut through. CNC — “With limits”: feasible only with diamond tools, slowly and with heavy wear. Silica dust: serious respiratory risk, always work wet and with extraction. 3D printing — specialist, not desktop.
Technical ceramics
Alumina, zirconia and advanced ceramics: extremely hard, heat- and wear-resistant. Very difficult to machine, almost always with diamond tools or specialist processes. Industrial rather than maker territory.
Craft ceramics
Studio clays and ceramics: they're formed, dried, fired and glazed. The potter's logic (kiln and glazes) more than the machine tool's. Extrusion-based clay 3D printing exists but is niche.
| Material | Laser | CNC | 3D printing | Food safe |
|---|---|---|---|---|
| Ceramic (stoneware / technical terracotta) | No | With limitations | No | Finished only |
Natural stones
Marble, granite, slate and the like. The CO2 laser engraves and marks the surface well but doesn't cut through the thickness; milling requires diamond tools, water and patience. Watch out for the silica dust of many stones: serious respiratory risk.
| Material | Laser | CNC | 3D printing | Food safe |
|---|---|---|---|---|
| Slate | No | With limitations | No | Yes |
| Granite | No | With limitations | No | Yes |
| Marble | No | With limitations | No | Yes |
| Soapstone (steatite) | No | Yes | No | Yes |
Plasters and cements
Plaster, mortars and casting cements. They're poured into moulds and worked once hardened; dry working generates fine dust (silica in cements) to manage with extraction and protection. Cheap materials for casts and trials.
| Material | Laser | CNC | 3D printing | Food safe |
|---|---|---|---|---|
| Gypsum plaster (hydrated calcium sulphate) | No | Yes | No | No |
Working with Ceramics, stones and mineral materials: what to know
On the laser, the keyword is engraving, not cutting. A CO2 marks and engraves slate, glazed tiles, stone and ceramic with excellent aesthetic results, but it doesn't cut through any significant thickness: the material doesn't vaporise, at most it chips or blackens on the surface. For many decorative projects this is more than enough.
In CNC milling you need the right tool: diamond or carbide bits and cutters, low speeds and feeds, often water cooling. Wear is very high and times are long. The real risk, though, is dust: cutting or sanding materials containing silica (many stones, stoneware, some cements) generates respirable silica dust, linked to severe lung damage. Extraction, wet working and respiratory protection are not optional.
Artisan ceramic follows a logic all its own, made of forming, drying, first firing, glazing and second firing: closer to the potter's studio than to the machine tool. Ceramic 3D printing exists (clay extrusion, binder jetting) but remains a specialist field, far from the home printer.