My Tesseract Prop:
Hand made by me. 3 & 1/2 inch acrylic cube. Internal Blue LED lighting (no stupid LED base below, LOL.) Weighs as much as my cellphone.
Saw a guy selling heavy glass ones on an online auction site for like $80 w/ shipping.
Photo is from my deviantart account (hence the watermark)
DISCLAIMER: I am not selling any, so please don't get any bright ideas to flame me, as I just wanted to show everyone. Nor am I taking any commissions to make any more. I posted the same disclaimer on my deviantart page, since I had over a dozen PMs in less than 24 hours from people asking me to take commissions to make anymore.