![25x18mm Rainbow Matrix Collage Cabochon Oval Flat Back Stone S2181G](http://cameojewelrysupply.com/cdn/shop/products/S2181G_1024x1024.jpg?v=1637000840)
25x18mm Rainbow Matrix Collage Cabochon Oval Flat Back Stone S2181G
This stone is what we call a matrix stone. It is man made. I use this term to refer to stones created out of small pieces of material, then bound together with a very hard stone like compound. Something like a very hard resin. You see this type process used in fancy granite, marble or stone counter tops.