This instuctable will detail how to make one of the stones from The Fifth Element. For each stone you will need: around 6 inches of wire, two springs, one AAA battery, a maker-bot, and an LED the color of the element you are creating.
Step 1: Body
First, draw an equilateral triangle with each side 40mm long. Next, boss extrude the triangle to 100mm. Now extrude cut a smaller equilateral triangle (sides 29.6mm) 25mm into the top of the triangular prism. close the cavity with an identical triangle placed over the top of the hole 3mm thick. Your stone should now look like this in cross-section veiw: