Promethium is so rare and so radioactive I don't thing anyone's ever collected enough of it to tell. It would, however, presumably be a silvery-gray color like nearly all other metals.
Perlite does not have a streak color because it is a volcanic glass that does not leave a streak on a streak plate.
The streak color of calcite is white.
Promethium does not occur naturally on earth, but as a by-product of uranium fission. It is very radioactive and its salts have a pinkish or reddish color. Promethium colors its surrounding air with a pale blue-green light.
The streak color for wheat is white.
Color is the observable color of a mineral specimen in natural light. Streak is the color of a mineral when powdered. The color of a specific mineral specimen may be different than its streak color. Because many impurities can alter the color of a mineral, but not the streak, streak is a more accurate predictor in mineral identification.
the streak color is Dark Green
Perlite does not have a streak color because it is a volcanic glass that does not leave a streak on a streak plate.
Streak refers to the color of a mineral in powder form.
The streak color of calcite is white.
The streak color of calcite is white.
the color of the streak for dolomite is white
there is no name for the color, but there is the "streak" of a mineral, meaning the color of its streak.
Promethium does not occur naturally on earth, but as a by-product of uranium fission. It is very radioactive and its salts have a pinkish or reddish color. Promethium colors its surrounding air with a pale blue-green light.
The color of a mineral's powder is its streak. This is the color of the powdered form of the mineral when it is scraped against a hard surface. Streak is a more reliable indicator of a mineral's identity than its exterior color.
Chert has no streak, it is too hard.
The streak color for wheat is white.
The color of the cobalt streak is blue