Hello, according to the picture, your stone should be quartz stone, which belongs to a common stone. On the whole, its value is not great.

But pictures can only be used as a reference, and the specific identification needs to be identified by its density and permeability, or it may be a more precious category.

You can also consult your stones in the local antique market, where the staff should be familiar with your stones and should give you a satisfactory answer.

The above is my personal suggestion, I hope it will help your problem.