This study explores how certain salt minerals, found in places like the Great Salt Lake in Utah and a salt mine in Arizona, can preserve tiny traces of life, such as DNA and organic materials, over time. We focused on minerals like mirabilite, thenardite, gypsum, and glauberite, which form in salty, evaporite environments. Using lab techniques like X-ray diffraction and Raman spectroscopy, we identified the minerals and looked for any preserved organic matter. We also developed a method to carefully extract DNA from these delicate crystals without introducing contamination. Our results show that sulfate minerals can trap and protect signs of life, even under harsh conditions. This research helps us better understand how biosignatures might be preserved in salty environments on Earth and informs future analysis of samples returned from other planetary bodies.