These are the two tallest jars - probably about 18" tall. I painted and glazed my initials in Hebrew on one jar.
The best speculation I can do on the coloring of the jars is their placement in the kiln. The outsides of the jars are left unglazed. The inside has a clear glaze liner. I used Anasazi ^6 and fired in reduction.
This jar was made of ^6 porcelain and fired in reduction. It's lined with a clear liner glaze.
I've since started making the bottoms different so there's more lift to the jars.