Venetian Plaster Ceiling
Venetian Plaster is a Finishing technique using thin layers of plaster applied with a spatula or trowel and then burnished to create a smooth surface with the illusion of dementional depth and texture.
"Venetian plaster" is American-made term to explain the variety of different techniques and materials used to create the polished stucco finish. The Term "Venetian Plaster" is common misconception.
The English word "plaster" comes from old French word "plaister" which literally means gypsum. The term "Venetian plaster" is mainly used between architects and designers in the US.
None of the materials used to create those finishes is plaster except the Scagliola finish. Basic Plaster mix is gypsum, sand and lime or just the gypsum and sand. In other words gypsum is the main material in the plaster mix. Stucco is the mix of lime and sand (Traditional) and modern stucco is the mix of lime, cement and sand. So, main material in the modern stucco mix is the cement and traditional mix is the lime or hydraulic lime used in polished stucco.