Diamond-cut gem

Step 1 of 3 · add 4 tiles
Lay the top
Lay four squares in a 2 by 2 block for the flat top of the gem.
Open this build in the play room
The trick
Every sloped facet is a triangle's long edge held at 45 degrees, so the gem tapers straight from a flat top down to one point.
What you will need
- 4 square tiles
- 6 right-angle triangle tiles
Step by step
1. Lay the top
Lay four squares in a 2 by 2 block for the flat top of the gem.
2. Widen the shoulders
Add a triangle at each top corner and one on each side so the gem bulges out to its widest line.
3. Cut the point
Under the block set two triangles that meet in one tip, the bottom of the gem.
This build works with any standard-footprint tile, so the brand you own matters less than the count. Short on tiles for it? The first-pack guide covers how to grow a collection without overpaying, the brand ranking covers which sets hold a build this size, and the compatibility guide covers mixing a cheap set into one you already have.