Indeed most regulatory regimes recognise the difference between amorphous and crystalline silica and most embody the belief that one crystalline form – cristobalite – is more active than the others. Although the isomorphs are well-defined mineralogically the names may be used ambiguously with some ...
Indeed, there is always the train of gossip that swirls around, but you CERTAINLY, well, ok, RARELY, found anyone in the hallways of hotel shows, or in the middle of arena just shouting obscenities and showering the show with bad tidings. If there was, or when, those sellers would not ...
(a–c) The cross-sections reveal evidence of submicron size titanomagnetite particles in the near-surface of the grain that display similar morphological traits as titanomagnetite particles found on the surface of Grain 1. (d–f) Submicron size titanomagnetite particles appear along the fungal-...
Neither rule will be easy for operators to implement.Many operators are already taking significant steps toward anticipated compliance requirements with the respirable crystalline silica rule before the rule is even in place. This may be prudent, as the proposed rule is complex and operators will lik...
Left-hand crystal is 3.0cm. ©Enchanted Minerals LLC Somewhat similarly, some Pecos Valley Diamonds are found with differing degrees of quality of quartz within the same specimen: very crudely crystalline “knobs” give way to well-formed and lustrous crystals. These are currently poorly ...
The growth of the knowledge is well reflected in the series of international meetings on this topic that started with a first conference in the UK in 1979 and has since been held 11 times. The first conferences were dominated by asbestos, crystalline silica and coal dust, which were mostly ...
Nanoparticles serve various industrial and domestic purposes which is reflected in their steadily increasing production volume. This economic success comes along with their presence in the environment and the risk of potentially adverse effects in natura
The growth of the knowledge is well reflected in the series of international meetings on this topic that started with a first conference in the UK in 1979 and has since been held 11 times. The first conferences were dominated by asbestos, crystalline silica and coal dust, which were mostly ...
For the more advanced collector, there is definitely potential for some larger, higher quality quartz in the area. Perhaps if a lot of effort was put into this site, something could open up. I have also found other quartz veins nearby. Who knows what’s really out there. Maybe something ...