The "chips" are indeed glass, sorry to tell you that Gary...
The correct name for that type of glass is Dalle de verre...https://en.wikipedia.org/wiki/Dalle_de_verre
The slabs come 8' x 12" x 1" and after cutting and chipping the edges you're left with piles of "chips".
Just more stuff to play with.
Here's a picture of the original project.
The process for this little item was a simple V-Carve and pocket into the clear acrylic.
Placing the "chips" and then using a exotic glass glue ( Hxtal ) with some red tint to adhere the glass to the acrylic..
It not really that " creative" just something that I've been thinking about for some time....using other materials in one project.