For the majority of minerals, the streak color obtained when the mineral is scratched against a porcelain plate is ___________________.
a.) less variable than the color in hand sample among crystals
b.) more variable than the color in hand sample among crystals
c.) (I don't think it's this one) - always dark brown or black
d.) (WRONG) - likely to be diagnostic only if the mineral is hard enough to scratch the porcelain.
I think it's either A.) or B.)... and if I had to pick one, I would chose A.)
I did an entire lab on minerals and their streak colors, but I still do not know the answer to this.
Can anyone confirm A.) ?
Thank you!
a.) less variable than the color in hand sample among crystals
b.) more variable than the color in hand sample among crystals
c.) (I don't think it's this one) - always dark brown or black
d.) (WRONG) - likely to be diagnostic only if the mineral is hard enough to scratch the porcelain.
I think it's either A.) or B.)... and if I had to pick one, I would chose A.)
I did an entire lab on minerals and their streak colors, but I still do not know the answer to this.
Can anyone confirm A.) ?
Thank you!