Ads
related to: selenite bracelet 8mm black pearl
Search results
Results From The WOW.Com Content Network
Selenite, satin spar, desert rose, and gypsum flower are crystal habit varieties of the mineral gypsum.. All varieties of gypsum, including selenite and alabaster, are composed of calcium sulfate dihydrate (meaning that it has two molecules of water), with the chemical formula CaSO 4 ·2H 2 O. Selenite contains no selenium, the similar names both derive from Greek selḗnē (σελήνη 'Moon').
This bracelet was a wedding gift from Charles and purchased from Wartski. It was one of only two pieces in Diana's personal collection containing real emeralds, a stone Diana didn't often wear. [2] [page needed] Diana wore this bracelet notably while at London's Barbican Centre in 1982 and would continue wearing it early on in their relationship.
Servilia's pearl was a pearl given by Julius Caesar to his favourite mistress Servilia. It was described by imperial biographer Suetonius to be a lone ( uniones , meaning "singleton") [ 1 ] large black pearl [ 2 ] worth six million sesterces (approximately 1.5 billion dollars in 2019 value), making it perhaps the most valuable gem of all time.
Nacre (/ ˈ n eɪ k ər / NAY-kər, also / ˈ n æ k r ə / NAK-rə), [1] also known as mother-of-pearl, is an organic–inorganic composite material produced by some molluscs as an inner shell layer.
The chronic toxic dose of selenite for humans is about 2400 to 3000 micrograms of selenium per day. [140] Hydrogen selenide is an extremely toxic, corrosive gas. [ 141 ] Selenium also occurs in organic compounds, such as dimethyl selenide, selenomethionine , selenocysteine and methylselenocysteine , all of which have high bioavailability and ...
Aquamarine is a pale-blue to light-green variety of the beryl family, [2] with its name relating to water and sea. [3] The color of aquamarine can be changed by heat, with a goal to enhance its physical appearance (though this practice is frowned upon by collectors and jewelers). [4]
Ad
related to: selenite bracelet 8mm black pearl