Welcome to the 2018 Rocks and minerals Question Marathon!
Short event description: Participants will demonstrate their knowledge of rocks and minerals.
[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?
Re: Rocks and Minerals B/C
Posted: September 6th, 2017, 8:36 am
by 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?
1. Sphalerite
2. 3.5-4
3. Orange
4. Black/Steel/Rosin Jack
5. Is it used as zinc ore?
Re: Rocks and Minerals B/C
Posted: September 6th, 2017, 12:48 pm
by whythelongface
I cannot see the picture for some reason...
Re: Rocks and Minerals B/C
Posted: September 6th, 2017, 1:45 pm
by dxu46
Sully0413 wrote:
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?
1. Sphalerite
2. 3.5-4
3. Orange
4. Black/Steel/Rosin Jack
5. Is it used as zinc ore?
Correct, your turn!
Re: Rocks and Minerals B/C
Posted: September 6th, 2017, 6:28 pm
by Sully0413
[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?
Re: Rocks and Minerals B/C
Posted: September 6th, 2017, 7:26 pm
by whythelongface
Sully0413 wrote:
[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
Re: Rocks and Minerals B/C
Posted: September 6th, 2017, 9:04 pm
by Sully0413
Correct!
Your turn.
Re: Rocks and Minerals B/C
Posted: September 7th, 2017, 12:40 pm
by whythelongface
[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
Re: Rocks and Minerals B/C
Posted: September 7th, 2017, 1:57 pm
by dxu46
whythelongface wrote:
[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
Re: Rocks and Minerals B/C
Posted: September 7th, 2017, 3:41 pm
by whythelongface
dxu46 wrote:
whythelongface wrote:
[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!
