Gypsum has the chemical formula CaSO4.2H2O
A selenite has the chemical formula Me(SeO3)-, where Me is a metal.
As gypsum selenites are salts.
Selenium is chemically similar to sulfur as it belongs to the same group in the periodic table (group 16). Both elements have similar chemical properties and can exhibit analogous oxidation states in chemical reactions.
The main mineral found in Plaster of Paris (POP) is gypsum. Chemically, gypsum is known as calcium sulfate dihydrate (CaSO₄•2H₂O). When you heat gypsum, it loses water and becomes calcium sulfate hemihydrate—which is what we call POP. Once you mix it with water again, it hardens quickly and is used for ceilings, walls, and decorative work. If you're working on interiors, you might also look into gypsum plaster, which is similar to POP but offers better strength and finish. Brands like Buildwell provide high-quality gypsum plaster products in India, and they’re widely used in modern construction. You can get full product details here: buildwell.in
Gypsum has a hardness of 2 on the Mohs scale, which is similar to the hardness of a fingernail.
Yes, graphite is harder than gypsum, so it can scratch gypsum.
Soft minerals, such as calcite or gypsum, would most likely become rounded at a faster rate when tumbled along a stream bottom due to their lower hardness compared to harder minerals like quartz or diamond. Soft minerals are more easily abraded and worn down by the forces of erosion in the stream, resulting in quicker rounding of their edges and surfaces.
Selenite Gypsum is used along with alabaster to prepare dental stones.
Selenite gypsum
Granite .
They felt fine until the Selenite Police drove them away from their encampment.
Clear. Sometimes white.
The translucent form of gypsum is called selenite. Selenite is a type of gypsum that is clear or white and often found in crystal form. It is prized for its smooth, shiny appearance and light-transmitting properties.
The Density (In My Testings) of Selenite is 1.8666666 repeating
Selenite is a form of gypsum, a dense mineral that does not float in water. It is heavier than water, so it will sink rather than float.
No it is not a salt. Gypsum is a mineral that occurs in nature as flattened and often twinned crystals and transparent cleavable masses called selenite.
Gypsum dihydrate is a mineral form of calcium sulfate with two water molecules attached. It is commonly found in nature as a white, chalky mineral and is often used in construction and as a soil conditioner. When heated, gypsum dihydrate loses its water molecules and forms the mineral anhydrite.
Selenite is commonly used for its calming and purification properties. It is believed to provide emotional healing, promote clarity of mind, and enhance spiritual awareness. Additionally, selenite is used for cleansing and charging other crystals.
Gypsum is a soft stone. It only has 2 on the Mohs Hardness Scale. Anything harder than it will polish it.