The fine deposit of mineral dust left on an abrasive surface when a mineral is scraped across it; especially the characteristic color of the dust.
The color of a mineral in its powdered form. This color is usually determined by rubbing the mineral against an unglazed porcelain slab and observing the mark made by it on the slab.
The color of a mineral in the powdered form.
the line of powder obtained by scratching or rubbing a mineral upon a hard, rough, white surface
a marking of a different color or texture from the background
mark with spots or blotches of different color or shades of color as if stained
a gouge line on the marble surface and here is where some reconditioners leave marks on marbles
a long mark or stripe of color
The color of a mineral in powdered form. Streak is normally determined by scraping a specimen across a surface of unglazed porcelain known as a "streak plate".
The powdery mark created when some minerals are scratched against one another.
The color of the powder produced by pulverizing a mineral on an unglazed ceramic plate.
The colour that a powered mineral leaves when it is scratched on an unglazed white tile. Scientists use the streak of a mineral as an identification method. Even with the presence of impurities, the colour of the streak remains constant. Pyrite (fool's gold) is a mineral which has a streak colour (black) very different from the colour of the mineral itself. This is very handy for determining whether a sample is real gold or fool's gold. Pyrite will leave a black powder if it is scratched on a white tile, whereas real gold will leave a yellow/gold smear.
The color of a mineral in its powdered form, usually obtained by rubbing the mineral on a streak plate and observing the mark it leaves. Streak is an important characteristic in mineral identification.
(CARPET) A discoloration or irregularity extended as a stripe in the carpet
colour colour of mineral when scraped Azurite, Jet
The color of the powder produced when one mineral is scratched byanother, harder one.
The color of the fine powder of a mineral obtained by scratching or rubbing against a hard white surface and constituting an important distinguishing characteristic. Note: the streak color may be completely different from the color observed at the surface of the mineral.
The colour of the powder of a mineral.
The streak of a mineral is its color when it is in powdered form. You can determine the streak of a mineral easily by rubbing a rough mineral (not cut stones!) along the surface of a hard, unglazed porcelain sheet (this is called a streak plate - you can use the back of a white porcelain bathroom tile). Even though the color of a mineral may vary, the streak color is constant. Note: the streak plate has a hardness is about 6.6, so it can only test mineral that are harder than that (since they must leave a streak on the porcelain). For example, the streak of chalcopyrite, graphite, magnetite, and pyrite is black, the streak of galena is gray, the streak of cinnabar, the streak of azurite and lapis is blue, the streak of malachite is green, the streak of turquoise is white with a green tint, the streak of olivine, amethyst, and tourmaline is white, and the streak of hematite is red-brown.
the color of the fine powder produced when a mineral is rubbed upon a hard surface. Hematite has a red streak, magnetite a black streak. [AHDOS