Search found 24 matches

by havendude
December 10th, 2012, 9:00 pm
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 130447

Re: Rocks and Minerals Question Marathon

Porphyritic andesite?
by havendude
November 19th, 2012, 3:06 pm
Forum: 2013 Study Events
Topic: Rocks & Minerals B/C
Replies: 116
Views: 43070

Re: Rocks & Minerals B/C

thsom wrote:What is the difference between double refraction and birefringence (or, refraction vs. refringence?)
They're synonyms. It would still be a good idea for you to know both of them for tests.
by havendude
November 15th, 2012, 3:00 pm
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 130447

Re: Rocks and Minerals Question Marathon

Your turn
by havendude
November 14th, 2012, 6:20 pm
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 130447

Re: Rocks and Minerals Question Marathon

Image

Identify
by havendude
November 12th, 2012, 3:01 pm
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 130447

Re: Rocks and Minerals Question Marathon

hotchocolate123 wrote:
[img]http://www.geoprime.com/mineral/Images/hornblende.jpg[/img]
It looks like either anthracite or hornblende, but probably the latter.
by havendude
November 4th, 2012, 7:23 pm
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 130447

Re: Rocks and Minerals Question Marathon

Granite?
by havendude
October 30th, 2012, 10:31 am
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 130447

Re: Rocks and Minerals Question Marathon

Correct. Your turn.
by havendude
October 27th, 2012, 10:13 pm
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 130447

Re: Rocks and Minerals Question Marathon

Image

Identify the type of coal, and any differences between it and other types of coal.
by havendude
October 26th, 2012, 12:44 pm
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 130447

Re: Rocks and Minerals Question Marathon

hematite
by havendude
September 23rd, 2012, 7:44 pm
Forum: 2013 Build Events
Topic: Sounds of Music B
Replies: 195
Views: 53315

Re: Sounds of Music B

My partner wants to make a harp... does anyone have and advice for making one? Is a harp a good instrument to make for this event? An actual, orchestral-sized harp is probably going to be a real pain in the neck to make and transport. It would take a ton of supplies to make it, and high quality one...

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