I think they turned out great. If you want more uniform coverage, less mottled, you may need to adjust the soda ash you use. Also, if you are doing a low-immersion method, turn your jar or container. If you want more texture, you can play with other effects, like sprinkling with coarse salt to draw the colors into small points of light. Also, using an old toothbrush, you can spatter on some nice metallics or another color can produce some great effects. Part of the fun is never quite knowing what your end result will be.
Where did you get your dye? Dharma Trading has a great selection.
Also - a reminder - some of the chemicals used in dyes are not meant to be injested. Once you use an item for dye, NO FOOD in that container. I use a salad spinner to get excess dye out and would never dream of using it for food.