Limonite is only a synonym for goethite.
Goethite
Chemical formula: Fe3+O(OH)
Crystal system: orthorombic bipyramidal
Dana class: Hydroxides and oxides containing hydroxyl
Synonym: limonite
Limonite belongs to the mineral group known as oxides and hydroxides.
Limonite belongs to the mineral group known as oxides. It is a type of iron ore that consists mainly of hydrated iron oxide minerals.
Hematite has a red streak. It can vary in depth of color, depending on the variety of hematite. Limonite has a yellow-brown (More brown than yellow) streak. But you have to make sure you are streaking the limonite and not an underlying mineral, if the limonite is located on another mineral.
Limonite is a mineral, a component of rock.
Goethite Chemical formula: Fe3+O(OH) Crystal system: orthorombic bipyramidal Dana class: Hydroxides and oxides containing hydroxyl Synonym: limonite
Limonite is a recognized mineral by the IMA, although its chemical structure will vary. As a mineral, it is not classified as igneous, sedimentary, or metamorphic in the manner of rock identification
Hematite has a red streak. It can vary in depth of color, depending on the variety of hematite. Limonite has a yellow-brown (more brown than yellow) streak. But you have to make sure you are streaking the limonite and not an underlying mineral, if the limonite is located on another mineral.
The value of limonite can vary depending on factors such as quality, quantity, and market demand. Generally, limonite is not considered a high-value mineral compared to other ores. Its worth is more often determined by its use in pigments, soil conditioners, and as an iron ore.
Limonite is typically opaque and lacks transparency due to its composition, which includes various hydrated iron oxide minerals. This mineral often appears dull or earthy in texture, further reducing its transparency.
Limonite is not a metallic mineral. It is actually an iron ore which often has a yellow-brown color due to the presence of hydrated iron oxide minerals. Minerals like pyrite and chalcopyrite are examples of metallic minerals.
Zinc is a metal element and is not classified under a specific mineral group. It is commonly found in nature as the mineral sphalerite, which is a zinc sulfide.
The tourmaline group (cyclosilicates)