Firstly, it is the colour that is the main indication to distinguish the quality of the teak wood.
If it is deeper and richer, this highlights that the level of natural oil content is extremely high.
Another way to check the quality is to look for any splitting or cracks which should not be visible when the teak wood is of an exceptional level.
What is more, the wood should not be stained, coloured, or treated with any additional protectors before or after purchasing as the raw materials found within the wood are already enough to protect it for years to come!