Oak cut methods shortly explained. Different cut - different pattern.
Plain sawn boards displays a nice cathedral pattern or flame-shaped peaks on the board.
Plain sawn boards are wider than quarter sawn or rift sawn boards.
Also this cut method often refers as tangential grain.
Quarter sawn (or radially cut) oak wood has beautiful straight grain pattern. Quarter sawn lumber is defined as wood where the annular growth rings intersect the face of the board at a 60 to 90 degree angle.
When cutting this lumber the log is literally quartered - quarter sawn oak creates a beautiful visual effect.
Quarter sawn boards are more stable than plain sawn and being less susceptible to absorbing and releasing atmospheric moisture.
Rift sawn oak can be manufactured either as a compliment to quarter sawn lumber or logs can be cut specifically as rift sawn. In rift sawn lumber the annual rings are typically between 30-60 degrees, with 45 degrees being optimum.
Each of these boards is cut radially, perpendicular to the growth rings of the tree. There are large triangles of waste left from between each board.
As a result, rift sawn lumber is costly to produce and therefore, the most expensive type of planks available from a log.