Difference between Raphides and Cystolith

Raphide  are needle shaped crystals of Calcium oxalate.

• Found in Pistia, Colacasia etc. in their petiole

Cystolith:

• Calcium carbonate crystals  found in the leaves of Ficus
• Also found in members of the families of Acanthaceae, Curcurbitaceae .
• In Ficus leaves, these crystals are arranged in the form of bunch of grapes.
• In Momordica, double cystoliths are found in the epidermal cells.
• Cystolith are formed in specialized cells called lithocysts in leaves.