A mineral of great hardness, and, when transparent, of much beauty. It occurs in hexagonal prisms, commonly of a green or bluish green color, but als…
oewn 2023
0% interchangeable
Open English WordNet identifies the related term as a containing group, substance or whole.
A mineral, found in crystals, of a yellow to green or brown color, and consisting of aluminia and glucina. It is very hard, and is often used as a ge…
oewn 2023
0% interchangeable
Open English WordNet identifies the related term as a containing group, substance or whole.
A mineral of a nearly black color and vitreous luster, and consisting principally of the silicates of yttrium, cerium, and iron.
oewn 2023
0% interchangeable
Open English WordNet identifies the related term as a containing group, substance or whole.