Broken gypsum crystals often variety a lot less nicely-formulated rhombs than dolomite does. If Component of a sample is crushed right into a powder, the powdered dolomite can even react with acid to create little bubbles, whilst gypsum would not. Agates: A variety of quartz that sorts in volcanic rock. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050