<p><span style="color: #ffffff;">We recommend you start with a ruby or sapphire, but you are welcome to change to a diamond at any time. We don't start with diamonds as when you first use a waterjet after installation, there are burrs, etc. that will break free and could damage an orifice. If you damage a diamond in this way, the warranty will be voided. A diamond orifice is guaranteed for 500 hours and costs about $500. A ruby orifice could last about 40 - 80 hours and costs $20.</span></p>