Galena's streak is gray, hematite's streak is deep maroon/brown.
Different minerals produce different colour powders (know as the mineral's 'streak') when scratched. For instance, hematite has a red streak, calcite has a white streak and graphite has a black streak. There is also variation within some minerals, depending on impurities. It should be noted that some minerals are too hard to be scratched by porcelain, and will instead powder the porcelain, producing a misleading white streak.
The streak of a ruby is white.To find the streak of a ruby, or any gem stone, rub a piece of gem material on a tile and look at the color of the streak it leaves.
Rubbing the mineral against an unglazed ceramic tile, called a streak plate, leaves a streak of the powdered mineral. This powder reflects the true color of the mineral. It's called a streak test, and the resultant line of color is called the streak. A link can be found below to check facts and learn more.
An emeralds streak is believed to be white, green, and/or yellow.
A streak test is used to determine a minerals streak color. This can help in the identification of minerals.
Gray
It is red. Or brown. Either one. Sorry, I tested and it was brown but websites all say blood-red. So.. idk.. srry.
Hematite can appear gray in color, but will exhibit a reddish to rust-colored streak.
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.
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.
A streak plate, or unglazed white porcelain tile, is used to perform streak tests which can help to identify minerals. Rubbing the mineral on the streak plate will finely powder it and reveal the color of the powder, which in some cases is quite different from the color of the mineral. Eg: hematite is black but has a red streak - a good way to tell you have hematite instead of one of the many other shiny black minerals.
The streak many not match the visual color whatsoever. That is why you must do the test. For example, I streaked a piece of specular hematite yesterday, which was a very dark, (nearly black), metallic color. It streaked red though, as all hematites do.
It's called the minerals streak
The streak color of a crystal is also called the powder color: the color of the grains produced when it is dragged along a hard flat, white surface.
Hematite's color is mostly sliver
common color for galena is a metallic silver
Galena is steel grey.