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but bottles from our regular supplier look like they were made by someone working remotely
It would be instructive for students to compare these two dune sands - both fine-grained but very different in color
particularly in analytical chemistry
concentrated into a huge dune field in present day southern Utah
These attractive clusters are washed
gypsum - sand selenite rose from a dry lake near Oujda, Morocco - large hand/display specimen but bottles from our regularSelenite gypsum sand rose CaSO4 2H2O Selenite gypsum sand roses form in seasonal desert lakes as they dry. Selenite is typically transparent, but when it crystallizes in sandy conditions it forms rosettes of flattened crystals, the rose petals, which are either encrusted with sand or with sand embedded throughout. The color of the gypsum crystals depends on the color of the sand in that dry lake. These Moroccan examples are particularly attractive.
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