This Could Be the Most Important 3-D Printing Material

Forget plastic, glass, ceramic, and metal. Sand could become the most important 3-D printing material out there.

Thanks to sand casting, which accounts for over 70% of metal casting, 3-D printing companies capable of printing with sand have a tremendous opportunity to benefit. In the video below, Fool.com contributor Steve Heller details the process of sand casting and how 3-D printing companies like 3D Systems (DDD 6.49%), Stratasys (SSYS 3.54%), and ExOne (XONE +0.00%) could all stand to benefit.