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Labradorite ((Ca, Na)(Al, Si) 4 O 8) is a calcium-enriched feldspar mineral first identified in Labrador, Canada, which can display an iridescent effect . Labradorite is an intermediate to calcic member of the plagioclase series.
aquamarine varieties), charoite, tourmaline, labradorite, selenite, feldspar, apatite, moonstone, thomsonite and scapolite amongst others. Chatoyancy is not limited to gemstones but can also be found in various wood species and carbon fiber. Synthetically made gemstones with optical fibers can also have chatoyancy. These gemstones are available ...
Sodium has a much larger ionic radius than potassium does, so during the quench event the sodium ions pop out of the crystal framework. These sodium ions form tiny oriented lenses of albite (sodium silicate feldspar) that are too small to be seen even using a microscope. It is the reflections from these albite laminae that produces the flash.
Ammolite is neither easily nor often imitated; however, a few materials have a passing resemblance that may deceive the unfamiliar. These include: labradorite (also known as spectrolite), an iridescent feldspar that may also be of Canadian origin; and broad-flash black opal. Neither are convincing substitutes, and the latter is actually of ...
Rarely do Japanese Ants kill Asian Honeybees, but they may do some damage. A squadron of ants can easily invade a hive, drain its food reserves, and pilfer the bee’s precious eggs. These smaller ...
If it does hit, possible impact sites include over the eastern Pacific Ocean, northern South America, the Atlantic Ocean, Africa, the Arabian Sea, and South Asia, the IAWN memo states.
A reescalating battle between pharmaceutical companies and pharmacy benefit managers is brewing in Washington, D.C., as President Donald Trump's new administration takes shape. The drug industry's ...
Similarly, in Yorkshire, Sprotborough Flash is the result of magnesian limestone extraction. The flash was created around 1900, but in 1990, the Environment Agency turned the flash into an overflow lake for the River Don when it was under flood conditions. [20] Several other flashes have been created or are created when the River Don is in ...