Low Density Stone? Does it mean it can break easily with Shock Waves?

The image says 234 AVG on what I believe is to be the Density ROI. Based on what I've seen around the web, is it normal for the stone to be low in density? can it be easily break during the Shock Waves?:

https://preview.redd.it/rkc06nr2ygtc1.png?width=1395&format=png&auto=webp&s=baf48716faca3b86017f7c63890491362111d3e7