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2. Emery (rock) - Wikipedia

   en.wikipedia.org/wiki/Emery_(rock)

   Emery mine on Naxos Island Corundite from the Naxos emery deposits. The corundum is blue, or sapphire.Wet slab, 10 cm (3.9 in) wide. Emery, or corundite, is a dark granular rock used to make an abrasive powder.

3. Helenite - Wikipedia

   en.wikipedia.org/wiki/Helenite

   Helenite, also known as Mount St. Helens obsidian, emerald obsidianite, and ruby obsidianite, is a glass made from the fused volcanic rock dust from Mount St. Helens and marketed as a gemstone. [1] [2] Helenite was first created accidentally after the eruption of Mount St. Helens in 1980.

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

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

   A Los Angeles County case poses a test of whether companies that make engineered stone can be successfully sued amid the devastating rise of silicosis, which has killed more than a dozen ...

5. Rockdust - Wikipedia

   en.wikipedia.org/wiki/Rockdust

   Rock dust is a pulverized rock, usually limestone, sprayed on walls inside underground coal mines to prevent coal dust explosions. The dust acts as a heat sink, keeps coal dust levels down, and also prevents the incidence of black lung disease. Rock dust has been used since the early 1900s, but technological improvements have occurred. [1]

6. Vulcan Materials Company - Wikipedia

   en.wikipedia.org/wiki/Vulcan_Materials_Company

   On February 19, 2007, Vulcan announced that it would buy stone and cement producer Florida Rock Industries for $4.7 billion. [6] [7] Vulcan completed the acquisition of Florida Rock on November 16, 2007. [8] In March 2007, Vulcan announced that it had been named to Fortune Magazine's list of Most Admired Companies for the sixth time. The ...

7. Dimension stone - Wikipedia

   en.wikipedia.org/wiki/Dimension_stone

   Dimension stone rates very well in terms of the criteria on the ASTM checklist for sustainability of building products: there are no toxic materials used in its processing, there are no direct greenhouse gas emissions during processing, the dust created is controlled, the water used is almost completely recycled (per OSHA/MSHA regulation), and ...

8. Quarter minus - Wikipedia

   en.wikipedia.org/wiki/Quarter_minus

   The quarter minus rock size can consist of rock in diameter as big as 1/4" in size and "fines" (anything smaller than the maximum allowable rock size (which in this case is 1/4), even as small as stone dust). Any aggregate with the name "minus" can contain up to 80% fines.

9. Engineered stone - Wikipedia

   en.wikipedia.org/wiki/Engineered_stone

   As with any silica-containing stone, silicosis can result from breathing dust produced when cutting or processing engineered stone made with quartz. The risk of inhaling quartz dust can be mitigated by taking appropriate safety precautions. [10] [11] Risk of silicosis is high when little or no safety precautions or protective equipment are used ...