Rocks and Minerals Question Marathon

[hexagonaria]

there is the streak, but obviously thats not gonna be very helpful all the time.. ive always thought that hornblende is generally shinier, and tends to form longer crystals. also, hornblende usually has some striations on its crystals.

anyways,



what are we looking at here? (what rock/mineral is this a close-up of??)

[iYOA]

ans? (Click to Show Hidden Text)

diatomite?

[hexagonaria]

yep! it's pretty isn't it?

[iYOA]

[hexagonaria]

could you try a different url for that pic please? its not working on my pc

[iYOA]

does that work

Hint: this was on the conestoga r&m test.

[Allinea]

Gypsum?

[hexagonaria]

thank you

[iYOA]

yes allinea is correct

[Allinea]

My turn now then?