Geneva Rock, which has withdrawn an application to expand its mining area at the Point of the Mountain by 73 acres, says it will reapply soon with a new application for a rezone of 18.5 acres.

Skyrocketing demand for quartz countertops has increased workers' exposure to silica dust, a chemical compound that causes lung damage. IE 11 is not supported. For an optimal experience visit our ...

Quartz and other silica-based materials can be characterized both in terms of whether they are amorphous or crystalline, as well as by their chemical composition. Defining Silica-Based Materials. Now ...

Proposed silica dust rules for coal mines may extend to sand, gravel quarries The federal government is working on regulations for U.S. mines which includes reducing exposure to silica dust for ...

Project Silica’s solution to this problem is to use femtosecond lasers to etch data into glass discs, creating deformations that are readable with a microscope. This method promises a storage ...

The UC Davis femtosecond laser purification has successfully improved the SiO2 grade of the Company's Belmonte, Bahia raw Silica Sand to 99.999% SiO2, as previously reported, and also the Company ...

Stone countertop workers are getting sick and dying due to exposure to silica dust A new study from UCSF/UCLA looks at the toll of silicosis on stone workers. Dozens of young Latino men in ...

Knight Optical stocks a vast range of high-precision Quartz and UV Fused Silica Windows in a range of shapes and sizes for a variety of applications.. UV Fused Silica Windows . With excellent chemical ...

Silica is a mineral made up of the elements silicon and oxygen and it is found under the ground in the form of quartz crystals, rocks and sand. It is mined for use as gemstones or in masonry ...