white
a sapphire doesn't have a streak.
Sapphires are composed of the mineral corundum and impurities that gave it its color.
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.
Sapphires are the gemstone version of the mineral corundum. Sapphires come in every color except red corundum which are considered rubies.
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.
Blue, but sapphires exist in all colors except red. A red sapphire is a ruby.
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.