This is an interesting butter dish. It is about 6 inches tall and is 7 inches across the base opening. The base is 1.5 inches tall. The domed butter dish is made of heavy pressed glass. The dish is large enough to serve as a cheese keeper as well. According to a database subscription site I use to help identify EAPG patterns and makers, the maker is unknown but the butter dish was made in the 1880s. The pattern features alternating panels of criss-cross with fine cut diamonds and clear. The pattern is identified as Clear and Diamond panels.
There are no cracks, but there is some rim roughness on the top which can be seen when the dish is held to the light. The base has a scalloped rim. There is a bubble and there are some straw-marks which are the result of the cooling process when the glass was being made. The glass has been black light tested and glows green under the UV. As a result of the age of the butter dish and the chemicals used during the manufacturing process, the glass has a light purple tinge.