What are the types of Sclerenchyma?

Fibers: elongated fusiform (spindle shaped) flexible cells, occur in roots, seeds, leaves and fruits as supportive elements, used in textile industry Stone cells: (sclereids) short cells of different shapes with very thick lignified wall, common in the shells of nuts and in the hard part of seeds and flesh of hard fruits, form cores of apples and produce gritty texture of pears