Bonded poly-resin is the most versitile of the materials for creating cameos'.

Usually mis-labeled 'resin' the functional diffrence is in it's ability to hold shape, color and form ; while adding strength.

The 'poly' may be sand - glass under heat- marble , plastics , stone ,wood. tree sap ; also kown as amber  { with age }the resin is the grinding into sand type particles.

The bondind is joining together to form the shape.

The primary reason I like this medium is a combination of it's strength and lasting properties .

Less likely to break it is more likely to hold it's color , shape and texture throughout the years .

A now commonly used came material ; it is often confused with resin. Rarely do dealers bother to mark , partly from indiference on their part ; mostly on the need to explain .

When a cameo is in high relief ; it is usually bonded poly resin. 3-D cameos' are plastic, or bonded poly resin. In everyday terms resin is usually placed as the material.