the streak is a white or brown powder
The name "peridot" is Greek for "to give richness."
Peridot's luster is vitreous to oily. (:
The most expensive form of peridot comes from specific meteorites, or, as they are known to collectors, pallasites. Peridot found in these is usually not in great shape due to impact, but when they are workable for faceting can run thousands of dollars above earthly peridot. A peridot from a pallasite found by Robert Haag is listed at $50,000. Part of that is likely the setting which is 22 karat gold, rimmed with diamond and lesser stones culled from the main peridot. On the same site for Robert Haag there is a 1.5 carat faceted peridot pulled from a pallasite. Price for that is not listed however.
Peridot (the silicate mineral) has 'poor' cleavage.See the related Wikipedia link listed below for more information:
the streak is a white or brown powder
by its streak color luster and density
Graphite is a mineral that does not leave a clear streak.
A streak plate has hardness of 7 on the Mohs scale, so harder minerals will not leave a streak. Diamond has a hardness of 10 and corundum is 9 - so neither will leave a streak.
It doesn't leave a streak.
The Streak Is White.
Some minerals are harder than a streak plate and will therefore leave no streak or the powder of the ceramic streak plate.
Diamond will not leave a streak on a porcelain streak plate because diamond is harder than the streak plate. It will leave a scratch on the streak plate for the same reason.
Flint would have a white streak.
Those minerals that are harder than the unglazed porcelain streak plate will scratch it rather than leave a streak.
Shale is a type of rock, not a mineral. Streak is used to help classify minerals. It can leave a streak, but it doesn't mean anything.
It leaves a brown streak.