Rocks & Minerals B/C ID/Question Marathon

[solakmagic]

I'm feeling (Click to Show Hidden Text)

Aragonite, Pyrite, aaaaaaaaaaaaaaaand Calcite

[vxpvm]

Yes to rockster, it's chalcopyrite, quartz, and calcite. Congratulations on your 9th! I'm going to an Invitationals tomorrow c: Go go go

[cellobix]

To keep things moving:

image (Click to Show Hidden Text)

[img]https://dl.dropboxusercontent.com/u/15231443/Mineral%20Replacement.jpg[/img]

What two minerals are shown here?
Explain the formation of this specimen. Which mineral came "first?"

[darkdeserthighway]

To keep things moving:

image (Click to Show Hidden Text)

[img]https://dl.dropboxusercontent.com/u/15231443/Mineral%20Replacement.jpg[/img]

What two minerals are shown here?
Explain the formation of this specimen. Which mineral came "first?"

Try (Click to Show Hidden Text)

malachite and azurite, azurite came "first", and over time, became malachite through weathering

[sofossils]

I agree with darkdeserthighway. Can we revive this?

Identify and tell me what the connection is to this and calcite (Click to Show Hidden Text)

[img]http://imagehost.vendio.com/a/35078160/aview/Aragonite.jpg[/img]

[wufactor2012]

i think (Click to Show Hidden Text)

it is aragonite and its a polymorph of calcite and doesn't have a definite crystal

[Allinea]

Taking a guess... (Click to Show Hidden Text)

Aragonite, they share the same chemical formula; both are calcium carbonate.

[hexagonaria]

Of no relation to the dragon rider... (Click to Show Hidden Text)

that is aragonite, which is isomorphic with calcite, meaning that it has the same chemical formula, CaCO3, but a different crystal structure.

[darkdeserthighway]

I agree with all of you

[sofossils]

You are all right, but wufactor got it first. Your turn!