Dichroic glass commonly called dichro for short is a glass that bends light to reflect the colors like the prism forming a rainbow. I will give you a clue about how it was said (dye-crow-ick) because I certainly didn't do it correctly first I tried it. The unique feature of this glass is that it does not use dyes, paints, or other types of coloring to make unique colors. It consists of several metallic micro oxide layers that provide the ability to reflect color.
I think that because it gets the color, Dichroic glass will be quite new, but actually dates back to at least the 4th century AD. and comes from Greek words "on" for two and "chroma" for color. The beauty of Dichroic glass seems to have more than one color at the same time, especially when viewed from a different angle. You can find the etched dichroic glass from Art Glass Supplies.com.
Dichroic glass is similar to the Italian Murano glass-making process and has been used in the style of Italian ornaments for hundreds of years. I don't know exactly when it became popular in our country to use in jewelry, only that in the last decade it seems to be increasingly popular. One reason I think this is very popular for jewelry making is that the process is used to make this glass, there are no two pieces that look identical.
You will think that because of the process involved in making Dichroic glass it will be very expensive, but I have seen some very beautiful jewelry at very reasonable prices. If you like unique jewelry, make sure to check the items made of Dichroic glass. One good thing is that you don't need to worry about meeting someone wearing identical works because, with the style of each artist and glass variation itself, originality is a safe bet.