This is a large, flat piece of turquoise. It has been polished on the front and is flat on the back. It has a material on the back, but I can not identify it. (I purchased these pieces out of an estate.)
It measures approximately 2 and 1/8 inches by 1 and 1/2 inches, although it is irregular in shape. The color is quite beautiful. It would make a wonderful piece of jewelry or just be pretty all on its own! There are, as of this listing, three large turquoise pieces listed.
If you have any questions, please feel free to convo them to me. I will do my best to answer them!