Birthstone Ltd Run Is described as "a transparent blue"
Heather Sellers says “Birthstone is a close cousin to Zoe, but with a slight hint of teal green. Similar to Zoe, hazing occurred when the glass was introduced to the flame. The hazing and slight bubbling cleared upon heating. The final bead finish is smooth and without blemish. I would classify Birthstone as a lighter version of Blue-yah!”