Definition: The Hebrew word translated as "alumina" in English has its roots in a specific type of mineral, which was found in ancient Egypt and Mesopotamia around 2500 BCE. This mineral is also known as alumium, but it's important to note that the term "alumina" often refers to a specific variety of glass, specifically glass made from chrysocolla (also known as alumina) which is derived from this mineral. The word "alumina" is Hebrew and can be translated into Greek as "dolmenia." This name comes from the Greek "domeia," meaning a stone or rock that is used for shelter. The specific type of glass found in Egypt and Mesopotamia was made using chrysocolla, which itself is derived from dolmens. The word "alumina" also has biblical application. It's often found in the Book of Psalms 18:9-10 where it refers to a stone used in the construction of a high place called a "dolmen." In the Bible, the word was associated with God and the Temple, and this particular stone is considered an offering made for Him. In summary, "alumina" is Hebrew and translates into Greek as "dolmenia" - a specific type of glass that was used in the construction of a high place called a "dolmen." The word is also associated with the Stone of the Lord (Psalm 18:9-10), which is often considered an offering made for God, and its stone is a symbol of His protection.