What piezoelectric materials can be made at home? [closed]

I would like to know a few examples of transparent materials which exhibit piezoelectricity and can be purchased online or synthesized at home with ease.

The top of my list for exhibiting piezo activity and can be easily purchased and is also transparent..

Quartz

That's about it. It's used everywhere - as an oscillator for quartz crystal watches, quartz crystal microbalances, etc.

Most of the other piezoelectric options:

• Barium Titanate ($\ce{BaTiO3}$)
• Zinc Oxide ($\ce{ZnO}$)