Fusionstone

Fusionstone is a material found on Bajor that the Bajorans have used as a building material for thousands of years. It is sometimes sand colored. 

The walls of the Naghai Keep were built with fusionstone. 

The buildings and thoroughfares of Ashalla were constructed using fusionstone. 

Fusionstone was used in the cells of the Elemspur detention center, a former monastery.