The piezoelectric crystal is simply quarts, and is used in exactly the same way to ignite your BBQ grill.
The key element is the deuterium, and that is not something you can obtain at your local hardware store.
Not to mention, deuterium is not cheap!
No... "quarts" is beer. "Quartz" are crystals.
Yeah now, But if there becomes a great demand for it, well there are 4 oceans and 100,000's lakes full of it.
While this used to be the case decades ago, it is actually quite inexpensive today. For instance, a cursory Google search turned up this page:
http://www.isotope.com/cil/products/displayproduct.cfm?prod_id=8782
Which offers deuterium oxide (heavy water) to North American customers at $275.00 per kilo. In the world of nuclear reactions this is dirt cheap. Thousands of times more energy, when fused, than contained in a $55 barrel of oil.
And, the supply is limitless.