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You may be thinking of unglazed porcelain, used in streak tests? The reason I'm not sure is that different minerals leave different color streaks. After all, it's not much of a test if there's never any difference in the results: "Let's try the gravity test... yep, falls down; you know, I'm starting to think that maybe this test is a waste of time."
What else can I help you with?
What is the birth name of Brown Mark?
Brown Mark's birth name is Mark Brown.
Why don't all minerals leave a streak?
Not all minerals leave a streak because streak is determined by the mineral's composition and hardness. A streak is produced when a mineral is scratched across a porcelain plate, and only those minerals that are softer than the plate can leave a mark. Additionally, some minerals may not leave a streak due to their crystalline structure or the nature of their surface, which can affect how they interact with the porcelain. Thus, only certain minerals, typically those with a hardness of less than 7 on the Mohs scale, will produce a visible streak.
When was Mark A. Brown born?
Mark A. Brown was born on 1961-02-10.
When was Mark E. Brown born?
Mark E. Brown was born in 1962.
When was Mark Brown - cricketer - born?
Mark Brown - cricketer - was born in 1958.
When was Leave a Mark created?
Leave a Mark was created on 1998-05-05.
How old is mark brown?
My name is Mark Brown I was born 12/10/1959
What has the author Mark Douglas Brown written?
Mark Douglas Brown has written: 'Capone'
What minerals is soft enough to leave streaks on paper?
The mineral graphite is soft enough to leave a mark on paper. We use graphite, which is a form of carbon, as pencil lead. And it works pretty darn well at leaving marks on paper.
How do you sayyou will leave a mark in french?
You will leave a mark Vous laissera une marque
When was Mark Brown - golfer - born?
Mark Brown - golfer - was born on 1975-02-09.
When was Mark N. Brown born?
Mark N. Brown was born on 1951-11-18.
