Hey,

*Hexagonal crystal system* -: The hexagonal crystal system has four crystallographic axes consisting of three equal horizontal, or equilateral axes at 120 degrees to each other as well as one vertical axis that is perpendicular to other three. The system has following forms-:
• Prism
• Pinacoid
• Dipyramid
• Ditrigonal pyramid

To learn more about this system, you can go through this link -:
http://metafysica.nl/hexagonal_1.html

Hope it helps!