The inclusions share a standard orientation, and when the light strikes the cabochon at the correct angle, they concurrently replicate a flash of light on the observer. The reflectance is known as aventurescence, and the material was named "aventurine." A gem pro is often a gemologist, a gem maker https://open.spotify.com/episode/47ADiH9K3EcX0mfNGb7fAZ