Rocks & Minerals B/C 2017

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Magikarpmaster629
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Rocks & Minerals B/C 2017

Post by Magikarpmaster629 »

Never too early to get started! This is also a fair place for discussion of the event.

We should be using this rocks and minerals list as the list for next year, since most ID lists don't change very much over the years.

Image
1. What mineral family does this specimen belong to?
2. What specific mineral is it?
3. What is its chemical composition?
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Re: Rocks & Minerals B/C 2017

Post by a boy »

1. silicates
2. quartz [crystal]
3. SiO2
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Re: Rocks & Minerals B/C 2017

Post by Magikarpmaster629 »

a boy wrote:
1. silicates
2. quartz [crystal]
3. SiO2
I was thinking 1 would be quartz and 2 would be smoky quartz; but I haven't done rocks before and your answer sounds better, so it's your turn.
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Re: Rocks & Minerals B/C 2017

Post by azuritemalachite »

Magikarpmaster629 wrote:
a boy wrote:
1. silicates
2. quartz [crystal]
3. SiO2
I was thinking 1 would be quartz and 2 would be smoky quartz; but I haven't done rocks before and your answer sounds better, so it's your turn.
Well smokey quartz isn't usually a variety we have to study and quartz is still a mineral not a family even though there are many variations of it. Rocks is the best; you should definitely do it next year! :)
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Re: Rocks & Minerals B/C 2017

Post by SenseiSushi »

Dang, I've been waiting for this for two long years...
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Re: Rocks & Minerals B/C 2017

Post by a boy »

Magikarpmaster629 wrote:
a boy wrote:
1. silicates
2. quartz [crystal]
3. SiO2
I was thinking 1 would be quartz and 2 would be smoky quartz; but I haven't done rocks before and your answer sounds better, so it's your turn.
oops you're probably right about the smoky quartz I haven't done this in too long

Image

1. Identify
2. Name a polymorph of this specimen
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Re: Rocks & Minerals B/C 2017

Post by SenseiSushi »

a boy wrote:
Image

1. Identify
2. Name a polymorph of this specimen
1. Calcite 
2. Aragonite
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Re: Rocks & Minerals B/C 2017

Post by a boy »

That's correct, your turn!
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Re: Rocks & Minerals B/C 2017

Post by Jaol »

Does everyone already have resources? :( :( It kinda feels like it :( :(
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Re: Rocks & Minerals B/C 2017

Post by Magikarpmaster629 »

I've noticed that almandine is described as having a vitreous or resinous luster. However, some pictures like this one are clearly opaque; not transparent like a vitreous luster is normally. Should I go with vitreous or try to describe it myself, since I don't know what kind of luster would fit that picture?
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