Hi Dan, There are some nice trade magazines that are very informative
as far as trends in stones. They talk about the famous designers and
their stones. Many times as I have seen, this begins a trend. When
David Yurman started with the blue chalcedony I had unending calls
about blue chalcedony. Now that he is using the Peruvian Blue Opal my
calls from jewelers for the Blue opal have increased tremendously.
Prices always vary depending upon the quality, the color, and who has
cut the material. From my own experience , blue seems to be a popular
color at the moment. Just like anything else, sometimes it just takes
a little publicity about a stone to make it very popular.
Some trade magazines with the you are interested in are:
Lapidary Journal, Colored Stone Magazine, National Jewelry,
Professional Jeweler, Modern Jeweler… Many of these publications do