Heating, melting and vitrification of rocks series 22 – Coral stone HEAT-TECH info 7 years ago This video is a heating, melting and vitrification of Coral stone by the Halogen Point Heater. Please check the following site for more information. Related page: Heating, melting and vitrification of rocks series 25 – (Olivine)2 Heating, melting and vitrification of rocks series 4 – Turbidite Heating, melting and vitrification of rocks series 6 – Pink-Granite Heating, melting and vitrification of rocks series 13 – Brick Heating, melting and vitrification of rocks series 24 – (Olivine) 1 Heating, melting and vitrification of rocks series 30 – Amethyst Green glass coating-2 Heating, melting and vitrification of rocks series 33 – Biotite