Design tool
Minecraft Diamond (Octahedron) Generator
Build a 3D diamond — an octahedron, like two pyramids base to base. Its flat cross-section is the classic diamond/rhombus, so you get both: the diamond outline per layer and the full gem shape in 3D.
Shape
The shape to generate. Each one has its own page with worked examples.
Size15 blocks
A diamond needs an odd size to come to a point at both ends, so this builds 15.
Layer 8 of 15198 blocks
Slide to step through the build from bottom to top.
How to use the Diamond Generator
Build a 3D diamond — an octahedron, two pyramids base to base — whose flat cross-section is the classic diamond, with the block count and a 3D preview.
Quick steps
- 1Set the size
- 2Choose Filled, or Outline or Thick outline (a hollow shell)
- 3Step through each layer (a diamond that grows then shrinks)
- 4Rotate the 3D gem to check it
Example use cases
- Decorative crystals and gems
- Flat diamond pixel art and floor patterns
- Hanging ornaments and centerpieces
Tips
Sizes are odd so the gem comes to a single-block point; an even size builds one smaller
Use hollow to build just the faces of a large crystal
The widest layer is the middle; it tapers to a point top and bottom
Frequently asked questions
How do you build a 3D diamond in Minecraft?
A 3D diamond is an octahedron — two square pyramids joined base to base. It is widest through the middle and tapers to a point at the top and bottom. This generator shows each layer (a diamond/rhombus that grows then shrinks) plus a rotatable 3D preview.
Is this a flat diamond or a 3D gem?
Both. The full shape is a 3D octahedron, and each horizontal layer is the flat diamond (rhombus) outline. View a single layer for a flat diamond pattern, or the 3D view for the whole gem.
What is a hollow diamond?
The outline style keeps only the outer surface — the sloped faces of the octahedron — so you can build the shell of the gem rather than a solid mass. Useful for decorative crystals and large hanging gems.
How many blocks does a diamond shape need?
A solid octahedron is far fewer blocks than the cube that contains it. A hollow one is just the shell. The generator shows the exact total and the count for the layer you are viewing.