Jasper
Formula: SiO₂
Historically, this name has long been applied to impure, opaque to slightly translucent, microcrystalline chalcedony or chert, typically red to brown or variably colored, usually containing abundant fine inclusions of hematite, iron hydroxides, and other minerals. The name is commonly associated with banded iron formations.
Historically, this name has long been applied to impure, opaque to slightly translucent, microcrystalline chalcedony or chert, typically red to brown or variably colored, usually containing abundant fine inclusions of hematite, iron hydroxides, and other minerals. The name is commonly associated with banded iron formations.
Historically, this name has long been applied to impure, opaque to slightly translucent, microcrystalline chalcedony or chert, typically red to brown or variably colored, usually containing abundant fine inclusions of hematite, iron hydroxides, and other minerals. This term is commonly associated with banded iron formations. Furthermore, it is used informally by gemologists for many other opaque gem materials, including some igneous and sedimentary rocks.
