GRADE A QUALITY TEAK
There are 3 grades of teak wood: A, B, and C. They represent mature heartwood, immature heartwood, and sapwood. Mature heartwood is the highest quality of wood, while sapwood is the lowest.
Grade A teak refers to the mature heartwood of a teak tree. In order to harvest mature heartwood, a teak tree needs to be about 20 years old or more. Grade A teak is the timber that comes from the very center of the trunk, where the wood is rich with natural oil and were resins are concentrated.
The wood should feel slightly oily when you touch it. And it should have a warm golden color same as honey when new. The wood grains should be very close together as this is the densest part of the tree.
Grade A teak is what you want your furniture made from. When a teak tree is harvested, less than a quarter of the available wood will be Grade A. So this makes Grade A teak relatively expensive. Grade B or grade C teak are not very good for garden furniture, it simply will not last as long, is likely to be eaten by bugs and infestations and to discolour quickly. Even from the outset, the cheaper grades of teak will simply not look or feel anything like grade A teak and will quickly crack and appear worn exposed to a wet weather.