Fluorescence: Fluorescence will be the property of a mineral to emit visible gentle when subjected to ultraviolet radiation. Gypsum doesn't fluoresce under UV mild. Very commonly it's formed from your hydration of anhydrite by floor waters and groundwaters, and, Consequently, a lot of gypsiferous strata grade downward into anhydrite rocks. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050