Beryl
Abstract
Description
Be3Al2SiO6 - Mohs Hardness: 7 1/2 - 8. The most important physical properties of beryl are those that determine its usefulness as a gem. Color and clarity are very important. Beryl occurs in a diversity of colors, with some of those colors being highly desirable. It also occurs in transparent crystals that have clarity and size that are sufficient for faceting. Many beryls have a color that can be improved by heating.
item.page.type
natural object
StillImage
StillImage
item.page.format
image/jpeg
Keywords
environmental sciences