I just finished a darker blue/medium blue that came threw like a champ. It is only 5mm wide and about twice that in length. I had to cut down a much longer crystal to just get the area of the crystal that made an evenly balanced bi color stone. When I started, I would not have given very high odds that the junction between the different tone levels of blue would hold together. Now that it is polished I can see that the junction is jagged from being a terminus at one time. The final gemstone weighs 1.29 carats and I will try and get a picture up, since it is different. It not only was a solid gemstone, but it polished extremely well.