Where do you analyze it?
We would recommend ALS Chemex which is one of the best laboratories in Sweden. We have hired them many times and we are very satisfied. They have a variety of analyzes on their program. Here you Get the answers to what your stones, sink and till samples, etc. contains. Here's a link to ALS Chemex. Contact them and ask for a brochure or download it directly, or call 0911 65 800 and order the brochure.
In it you can choose which analysis you want and what it costs.
Of course we can help you if you do not want to take matters into your own hands.