What to do with 60+ glass bricks?!

Another awesome idea. You could perhaps set that up as a 'hall of mirrors' type display comprised of smaller pedestal type units.

If you do it as a single wall, then looking at around 150kg for 60 glass bricks alone. Not something you want falling over.

You appear to get PVC extrusion these days to lock the bricks together with adhesive rather than the rebar and mortar technique of yesteryear, however they advise a maximum combination of 5x5 this way before a row of rebar.

Another approach may be to go for a tilted back design rather than vertical. The blocks would then sit in a support frame pretty securely by gravity alone. If it was constructed out of T-slot extrusion, then could be dismantled for transportation and also be reconfigured into different structures for different use. 

Very cool find. My wife does mosaics with a wide variety of tiles/glass mounted on different substrates.  Here is a similar glass tile used as a substrate for a mosaic.  This piece is fitted with some LED fairy lights so that it glows with either sunlight (on a window sill) or at night.  Maybe not exactly what you are looking for, but it might lend you some insights to different ways you can work with colors and/or lights to create something interesting.

"...61 of them would stack into a hollow 6x6 pyramid (it worked for the Louvre in Paris)..."

I was thinking that with the hollow pyramid idea you could place lights / reflectors / diffusers within the hollow space rather than within the bricks themselves simplifying the construction. 

Another take on this might be two 570mm wide by 1900mm high columns with lights boxed in-between to create some sort of a monolith type sculpture. 

"The thing's hollow -- it goes on forever -- and -- oh my God! -- it is full of addressable LEDs!"

"...If you lay them horizontally you could have yourself a light up dance floor..."

Building a Glass Deck out of Glass Block
https://www.youtube.com/watch?v=mjlAMHT8q9M

Are you able to run a profile gauge over the edge of one of the bricks and post an outline of the profile?

Doesn't look like they would be easy to separate at the join as they are hot fused together during the manufacture process.

Glass Block - How It's Made
https://www.youtube.com/watch?v=5rt-oXQWX2s

However, a diamond cutting disk mounted in a table saw could make short work of it and open up some more creative options. 

Oops! Here is the picture:

If you want something a bit more glass-like, then here you go.

Not quite 'Also Sprach Zarathustra' but you get the general idea...