Discover the history and properties of lapis lazuli, a stunning blue rock prized for its color and gemstone uses.

The analysis of major, trace, and rare earth elements required grinding the selected samples to a 200 mesh powder. The samples ... XRD results indicate that the primary mineral components include clay ...

Figure 1 shows the result of a FULLPATfull-pattern fit of individual standard patterns to a sample containing well-ordered phases (calcite ... X-Ray Powder Diffraction Patterns, Version 10,” ...

the powder may still contain particles large enough to cause visible scratching on silver (Wharton et al. 1990). Naturally occurring calcium carbonate is generally found as the mineral calcite, which ...

Subscribe to the new Powder To The People newsletter for weekly updates. "All equipment is on-site and will be installed following this major winter storm," writes Maeve G. on Snowbird's snow report. ...

Instead of continuing to dig tunnels or pits, some scientists are looking to a promising yet challenging source of minerals: ...

The US and Ukraine seemed all set to sign a mineral deal on Friday. But Trump and Zelenskyy had a heated exchange of words in front of cameras in the Oval Office. Zelenskyy said Ukraine is ready ...