Let’s examine how this applies to the appearance of faceted stones. Figure 5* shows a uniaxial gem cut with the c-axis perpendicular to the table facet (since the crown plays only a minor role in the ...
These days, there are many choices of expensive green gemstones, but we created a list of the most popular and ranked them by price. Fluorite is found in shades of purple, blue and green. The stone ...