System Information
Operating system:
Graphics card:

Blender Version
Broken:
2.80 beta
(example: 2.79b release)
(example: 2.80, edbf15d3c044, blender2.8, 2018-11-28, as found on the splash screen)
Worked: (optional)

Short description of error
How to make Diamond Material in Eevee?
Is it possible?
I tried transparent, refraction,reflection,but finally failed.

Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).