Rocks and Minerals B/C

Test your knowledge of various Science Olympiad events.
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dxu46
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Re: Rocks and Minerals B/C

Postby dxu46 » April 12th, 2018, 8:55 am

Here's a question!

Image

1.What is the chemical composition of this specimen?
2.What mineral does this specimen form from?
3.List three other minerals that have the same classification

btw sorry that I takes up the whole screen I don't know how to do the reveal button thing
1. SiO2
2. It doesn't form from a mineral as it is a mineral, but I'm assuming you meant "what mineral is this a variety of," in which it is Quartz.
3. Amethyst, Agate, Chalcedony
Also someone answer my question above.

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Re: Rocks and Minerals B/C

Postby ScottMaurer19 » April 12th, 2018, 9:43 am

Here's a question!

Image

1.What is the chemical composition of this specimen?
2.What mineral does this specimen form from?
3.List three other minerals that have the same classification

btw sorry that I takes up the whole screen I don't know how to do the reveal button thing
1. SiO2
2. It doesn't form from a mineral as it is a mineral, but I'm assuming you meant "what mineral is this a variety of," in which it is Quartz.
3. Amethyst, Agate, Chalcedony
Also someone answer my question above.
Citrine forms from amethyst when it is heated/heat treated
Solon '19 Captain, CWRU '23
2017 (r/s/n):
Hydro: 3/5/18
Robot Arm: na/1/1
Rocks: 1/1/1

2018 (r/s/n):
Heli: 2/1/7 
Herp: 1/4/4
Mission: 1/1/6
Rocks: 1/1/1
Eco: 6/3/9

2019 (r/s/n):
Fossils: 1/1/1
GLM: 1/1/1
Herp: 1/1/5
Mission: 1/1/3
WS: 4/1/10

Top 3 Medals: 144
Golds: 80

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dxu46
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Re: Rocks and Minerals B/C

Postby dxu46 » April 12th, 2018, 1:23 pm

Here's a question!

Image

1.What is the chemical composition of this specimen?
2.What mineral does this specimen form from?
3.List three other minerals that have the same classification

btw sorry that I takes up the whole screen I don't know how to do the reveal button thing
1. SiO2
2. It doesn't form from a mineral as it is a mineral, but I'm assuming you meant "what mineral is this a variety of," in which it is Quartz.
3. Amethyst, Agate, Chalcedony
Also someone answer my question above.
Citrine forms from amethyst when it is heated/heat treated
No, I understand that, but it doesn't form from amethyst per se, as heat treating isn't creating a whole different mineral (kind of, but no).

Also
[img]https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRDHrKEU01AGGktGy8NTBQd21rz6E5BV1niWQBCIQZMyuACNQSm9g[/img][img]https://i.ebayimg.com/images/g/K3wAAOSwzgRWyMlV/s-l300.jpg[/img][img]https://amedia.britannica.com/700x450/94/7794-004-64899190.jpg[/img]
1. All three of these specimens are varieties of what mineral?
2. Name the three varieties in order from left to right.
3. Why do these varieties occur? (specifically, what elements make the mineral turn different colors?)
4. What crystal system does this mineral crystallize into?
5. Define triboluminiscence.
6. Is this mineral triboluminiscent?
7. Define piezoelectricity.
8. Is this mineral piezoelectric?

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Re: Rocks and Minerals B/C

Postby whythelongface » April 14th, 2018, 10:52 am

[img]https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRDHrKEU01AGGktGy8NTBQd21rz6E5BV1niWQBCIQZMyuACNQSm9g[/img][img]https://i.ebayimg.com/images/g/K3wAAOSwzgRWyMlV/s-l300.jpg[/img][img]https://amedia.britannica.com/700x450/94/7794-004-64899190.jpg[/img]
1. All three of these specimens are varieties of what mineral?
2. Name the three varieties in order from left to right.
3. Why do these varieties occur? (specifically, what elements make the mineral turn different colors?)
4. What crystal system does this mineral crystallize into?
5. Define triboluminiscence.
6. Is this mineral triboluminiscent?
7. Define piezoelectricity.
8. Is this mineral piezoelectric?
To my knowledge the rightmost two specimens are of the same variety.
WEST WINDSOR-PLAINSBORO HIGH SCHOOL SOUTH '18
EMORY UNIVERSITY '22
SONT 2017 5th Place Medalist [Microbe Mission]

"One little Sciolyer left all alone,
He went out and hanged himself and then there were none."

Congratulations to WW-P South for winning 14th place at Nationals!

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dxu46
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Re: Rocks and Minerals B/C

Postby dxu46 » April 14th, 2018, 11:25 am

[img]https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRDHrKEU01AGGktGy8NTBQd21rz6E5BV1niWQBCIQZMyuACNQSm9g[/img][img]https://i.ebayimg.com/images/g/K3wAAOSwzgRWyMlV/s-l300.jpg[/img][img]https://amedia.britannica.com/700x450/94/7794-004-64899190.jpg[/img]
1. All three of these specimens are varieties of what mineral?
2. Name the three varieties in order from left to right.
3. Why do these varieties occur? (specifically, what elements make the mineral turn different colors?)
4. What crystal system does this mineral crystallize into?
5. Define triboluminiscence.
6. Is this mineral triboluminiscent?
7. Define piezoelectricity.
8. Is this mineral piezoelectric?
To my knowledge the rightmost two specimens are of the same variety.
The one on the bottom is supposed to be translucent-transparent, slightly brown. I couldn't find a good picture, sorry.

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whythelongface
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Re: Rocks and Minerals B/C

Postby whythelongface » April 17th, 2018, 8:49 am

The one on the bottom is supposed to be translucent-transparent, slightly brown. I couldn't find a good picture, sorry.
I can't see that making much of a difference. Blue corundum is most often known as sapphire, regardless of how gemmy it is.
WEST WINDSOR-PLAINSBORO HIGH SCHOOL SOUTH '18
EMORY UNIVERSITY '22
SONT 2017 5th Place Medalist [Microbe Mission]

"One little Sciolyer left all alone,
He went out and hanged himself and then there were none."

Congratulations to WW-P South for winning 14th place at Nationals!

ScottMaurer19
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Posts: 588
Joined: January 5th, 2017, 9:39 am
Division: Grad
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Location: Solon, OH

Re: Rocks and Minerals B/C

Postby ScottMaurer19 » April 17th, 2018, 9:15 am

The one on the bottom is supposed to be translucent-transparent, slightly brown. I couldn't find a good picture, sorry.
I can't see that making much of a difference. Blue corundum is most often known as sapphire, regardless of how gemmy it is.
I was look at pictures earlier while making pictures for a test. The variety is supposed to show asterism/chatoyancy caused by inclusions but the picture doesn't exhibit any
Solon '19 Captain, CWRU '23
2017 (r/s/n):
Hydro: 3/5/18
Robot Arm: na/1/1
Rocks: 1/1/1

2018 (r/s/n):
Heli: 2/1/7 
Herp: 1/4/4
Mission: 1/1/6
Rocks: 1/1/1
Eco: 6/3/9

2019 (r/s/n):
Fossils: 1/1/1
GLM: 1/1/1
Herp: 1/1/5
Mission: 1/1/3
WS: 4/1/10

Top 3 Medals: 144
Golds: 80


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