Alpha Gold Stone Made from superior quality beneficiated mineral gypsum, this is a premium quality high strength and low expansion extra hard dental stone. Specially developed for casting of models, inlays, crowns and bridges. It is engineered to produce rapid strength gain and easy release properties, permitting short processing time. It has the unique ability to produce micron level detailed reproduction of substrate and to give extra hardness with ultra smooth surface. Additionally, this stone is designed to give bubble free flowless casts required for precision work.