Rocks and Minerals B/C

[dxu46]

Welcome to the 2018 Rocks and minerals Question Marathon!

Short event description: Participants will demonstrate their knowledge of rocks and minerals.

Question (Click to Show Hidden Text)

[img]https://www.google.com/imgres?imgurl=https%3A%2F%2Fwww.mindat.org%2Fimagecache%2Fbb%2Ff7%2F06678550014946250612180.jpg&imgrefurl=https%3A%2F%2Fwww.mindat.org%2Fmin-3727.html&docid=gf0ujO8o8WSwPM&tbnid=pNBBsUesdr_VcM%3A&vet=10ahUKEwjwlZKLlo_WAhWIRiYKHR_1A_cQMwiYASgAMAA..i&w=460&h=508&safe=active&bih=603&biw=1280&q=sphalerite&ved=0ahUKEwjwlZKLlo_WAhWIRiYKHR_1A_cQMwiYASgAMAA&iact=mrc&uact=8[/img]

[img]https://www.google.com/imgres?imgurl=http%3A%2F%2Fwww.mine-engineer.com%2Fmining%2Fmineral%2FSphalerite-small.jpg&imgrefurl=http%3A%2F%2Fwww.mine-engineer.com%2Fmining%2Fmineral%2Fsphalerite.htm&docid=NH_8soBXCuxDdM&tbnid=tMyDhQSygNiyIM%3A&vet=10ahUKEwj7sNXBlo_WAhWGwiYKHfsyAWY4ZBAzCAYoBDAE..i&w=900&h=780&safe=active&bih=603&biw=1280&q=sphalerite&ved=0ahUKEwj7sNXBlo_WAhWGwiYKHfsyAWY4ZBAzCAYoBDAE&iact=mrc&uact=8[/img]

Both specimens are the same mineral.

1.  What is this mineral?
2.  What is the hardness of this mineral?
3.  Under shortwave UV light, what color will this mineral fluoresce?
4.  What is a common name that miners like to call this mineral?
5.  What is this mineral's main usage?

[Sully0413]

1. What is this mineral?
2. What is the hardness of this mineral?
3. Under shortwave UV light, what color will this mineral fluoresce?
4. What is a common name that miners like to call this mineral?
5. What is this mineral's main usage?

[b]Answer[/b] (Click to Show Hidden Text)

1. Sphalerite
2. 3.5-4
3. Orange
4. Black/Steel/Rosin Jack
5. Is it used as zinc ore?

[whythelongface]

I cannot see the picture for some reason...

[dxu46]

1. What is this mineral?
2. What is the hardness of this mineral?
3. Under shortwave UV light, what color will this mineral fluoresce?
4. What is a common name that miners like to call this mineral?
5. What is this mineral's main usage?

[b]Answer[/b] (Click to Show Hidden Text)

1. Sphalerite
2. 3.5-4
3. Orange
4. Black/Steel/Rosin Jack
5. Is it used as zinc ore?

Correct, your turn!

[Sully0413]

[b]Question[/b] (Click to Show Hidden Text)

[img]https://i.pinimg.com/originals/ce/7c/b6/ce7cb6aee4108c4a03be08743ea9fa91.jpg[/img]
1. What mineral is this?
2. What are the sets of intersecting crystals called?
3. What is this mineral's hardness?
4. Where does this mineral normally form?
5. What crystal system does this mineral belong to?
6. What is a common name for this mineral?

[whythelongface]

[b]Question[/b] (Click to Show Hidden Text)

[img]https://i.pinimg.com/originals/ce/7c/b6/ce7cb6aee4108c4a03be08743ea9fa91.jpg[/img]
1. What mineral is this?
2. What are the sets of intersecting crystals called?
3. What is this mineral's hardness?
4. Where does this mineral normally form?
5. What crystal system does this mineral belong to?
6. What is a common name for this mineral?

1. Staurolite
2. Cruciform twins
3. 7-7.5 on the Mohs scale
4. Metamorphic rock of medium to high metamorphic grade
5. Monoclinic
6. Fairy cross

[Sully0413]

Correct!

Your turn.

[whythelongface]

[b]Question[/b] (Click to Show Hidden Text)

[img]http://www.healingcrystalshealingstones.com/images3/Albitehealingcrystals.jpg[/img]
1. What is the chemical formula for this mineral?
2. What is this specific variety of this mineral called?
3. What kind of cleavage does this mineral display?
4. Name two minerals this mineral commonly occurs in conjunction with.
5. Name one use this mineral has in industry

[dxu46]

[b]Question[/b] (Click to Show Hidden Text)

[img]http://www.healingcrystalshealingstones.com/images3/Albitehealingcrystals.jpg[/img]
1. What is the chemical formula for this mineral?
2. What is this specific variety of this mineral called?
3. What kind of cleavage does this mineral display?
4. Name two minerals this mineral commonly occurs in conjunction with.
5. Name one use this mineral has in industry

1. NaAlSi3O8
2. Albite (plagioclase group/albite-anorthite series)
3. Tabular
4. (groups) K-spar and quartz
5. Useful in the manufacturing of ceramics

[whythelongface]

[b]Question[/b] (Click to Show Hidden Text)

[img]http://www.healingcrystalshealingstones.com/images3/Albitehealingcrystals.jpg[/img]
1. What is the chemical formula for this mineral?
2. What is this specific variety of this mineral called?
3. What kind of cleavage does this mineral display?
4. Name two minerals this mineral commonly occurs in conjunction with.
5. Name one use this mineral has in industry

1. NaAlSi3O8
2. Albite (plagioclase group/albite-anorthite series)
3. Tabular
4. (groups) K-spar and quartz
5. Useful in the manufacturing of ceramics

4/5. I was looking for "perfect, good, imperfect" for cleavage, or, if you are really savvy with 3D coordinates, "Perfect on [001], good on [010], imperfect on {110}" as defined by http://www.mindat.org, I believe that "tabular" is more of the habit shown here. Very good!

Your turn.