First of all, the pineapple grid is just a non-standard scientific name, divided into Indonesian pineapple grid, African pineapple grid, Burmese pineapple grid according to different origins. For a penny, the identification of a pineapple can only identify a particular pineapple, such as the Indonesian pineapple. The method of distinguishing Indonesian pineapple grid is that in the middle of wood grain, there will be small dots of yellow color, commonly known as gold wire. If you have the conditions, you can cut the floor and see if there is a gold thread in the cross section. The gold thread is really the Indonesian pineapple grid.
Secondly, you can ask for a certificate of origin when you choose Indonesian pineapple. The certificate of origin is the only valid document that can prove the authenticity of the pineapple.
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