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2. Pseudomorph - Wikipedia

   en.wikipedia.org/wiki/Pseudomorph

   Silica pseudomorph after gypsum crystals and silicified serpulid polychaete tubes Pseudomorph of goethite after pyrite. In mineralogy, a pseudomorph is a mineral or mineral compound that appears in an atypical form (crystal system), resulting from a substitution process in which the appearance and dimensions remain constant, but the original mineral is replaced by another due to alteration, or ...

3. Permineralization - Wikipedia

   en.wikipedia.org/wiki/Permineralization

   Permineralization, a type of fossilization, involves deposits of minerals within the cells of organisms. Water from the ground, lakes, or oceans seeps into the pores of organic tissue and forms a crystal cast with deposited minerals. Crystals begin to form in the porous cell walls.

4. Aragonite - Wikipedia

   en.wikipedia.org/wiki/Aragonite

   Aragonite is a carbonate mineral and one of the three most common naturally occurring crystal forms of calcium carbonate (Ca CO 3), the others being calcite and vaterite. It is formed by biological and physical processes, including precipitation from marine and freshwater environments. Aragonite crystal structure

5. History of watches - Wikipedia

   en.wikipedia.org/wiki/History_of_watches

   In 2019, Citizen Watch advanced the accuracy of a quartz watch to +/- 1 second a year. [47] The improved accuracy was achieved by using an AT-cut crystal which oscillates at 8.4 MHz (8,388,608 Hz). The watch maintains its greater accuracy by continuously monitoring and adjusting for frequency and temperature shifts once every minute.

6. Fossil - Wikipedia

   en.wikipedia.org/wiki/Fossil

   A derived, reworked or remanié fossil is a fossil found in rock that accumulated significantly later than when the fossilized animal or plant died. [98] Reworked fossils are created by erosion exhuming (freeing) fossils from the rock formation in which they were originally deposited and their redeposition in a younger sedimentary deposit.

7. Catholic nun among 25 arrested in mob bust in northern Italy

   www.aol.com/catholic-nun-among-25-arrested...

   A Catholic nun with the Sisters of Charity Institute in Milan was among 25 people arrested early Thursday morning for a litany of mafia-related crimes, including aiding and abetting extortion ...