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  2. List of U.S. state minerals, rocks, stones and gemstones

    en.wikipedia.org/wiki/List_of_U.S._state...

    ^ Since 1983, Massachusetts has had 3 other official state rocks: State Historical Rock (Plymouth Rock), State Explorer Rock (Dighton Rock), and State Building and Monument Stone . In 2008, a State Glacial Rock (Rolling Rock) was designated as well. [82] ^ A measure passed the Oregon Senate in March 1965 naming the thunderegg as Oregon's state ...

  3. List of quarries in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_quarries_in_the...

    In 1906 the state mineralogist of California reported on 52 granite quarrying areas in 17 counties. [2] Many quarries were opened temporarily to provide stone for one or a few local or regional construction projects, but could not compete later when railroads allowed for economical transportation of heavy building materials to the area.

  4. Engineered stone - Wikipedia

    en.wikipedia.org/wiki/Engineered_stone

    Engineered stone is a composite material made of crushed stone bound together by an adhesive to create a solid surface. The adhesive is most commonly polymer resin, with some newer versions using cement mix. This category includes engineered quartz (SiO 2), polymer concrete and engineered marble stone. [1]

  5. Incurable silicosis cost a countertop cutter his lungs. Are ...

    www.aol.com/news/incurable-silicosis-cost...

    In California, dozens of workers with silicosis have lodged lawsuits against companies like Cambria and Caesarstone. Reyes Gonzalez is the first of them to go to trial, according to his attorneys.

  6. California pottery - Wikipedia

    en.wikipedia.org/wiki/California_pottery

    California pottery includes industrial, commercial, and decorative pottery produced in the Northern California and Southern California regions of the U.S. state of California. Production includes brick , sewer pipe , architectural terra cotta , tile , garden ware, tableware , kitchenware , art ware , figurines , giftware , and ceramics for ...

  7. Indian Grinding Rock State Historic Park - Wikipedia

    en.wikipedia.org/wiki/Indian_Grinding_Rock_State...

    Indian Grinding Rock State Historic Park is a California State Park, preserving an outcropping of marbleized limestone with some 1,185 mortar holes—the largest collection of bedrock mortars in North America. It is located in the Sierra Nevada foothills, 8 miles (13 km) east of Jackson.