Cool off and beat the heat this summer with a flavor blasted creamy blue margarita. Here is how to make it! All images ...

This submission displayed an interesting blue band, seen through the pavilion facets (figure 1). The blue band could not be observed through the table facet. Infrared spectroscopy showed that it was ...

Aquamarine and heliodor are colored by Fe ions, an important coloring agent for beryl. Blue to yellow gem beryl was studied by quantitative spectroscopy and trace-element analytical techniques to ...