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Crystals in plants

In the cells of most plants, crystals consisting of calcium oxalate are found which are formed by a process called  biomineralisation. It is thought that these crystals act as a storage reservoir for calcium and also provide for the storage of toxic waste (detoxification). The crystals come in a variety of shapes and some are characteristic of certain plant groups.

Chromoplasts

The wide variety of colors in flowers and fruits is largely caused by pigment containing organelles called chromoplasts. Chromoplasts belong to the plastids and they are responsible for the bright red, orange and yellow colors in many fruits and flowers.