Soul Gems

My friends and I are cosplaying this year as characters from the anime Mahou Shoujo Madoka★Magica. I was asked to make a soul gem for madoka as well as kyoko~ I'm sayaka~ The whole process was about 6 hours ~ the blue is actually much lighter in person almost turquoise ~

I might start taking commissions if enough people are interested ~ Ill probably charge around $30-35 ~ what do you think ~ ?