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4meter last won the day on January 26 2016

4meter had the most liked content!

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About 4meter

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    Tucson, Arizona
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    rock/mineral/fossil collecting; geology; meteorology; astronomy; sailing; good food; wood working; afternoon naps.

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  1. The first two photos look like coral fragments. Not enough detail to go much beyond that.
  2. I think d-day nailed it. My take on a few are: # 5 looks to me to be purple Fluorite, # 15 might be pink Orthoclase feldspar, # 17 looks like the mineral Stibnite, an ore of antimony, # 22 looks like another piece of Tourmaline (Schorl) #25 could also be Galena an ore of lead. Very nice collection of minerals Nationalbank!
  3. Check out this Fossil

    Also called a claim or Bivalve; most likely Cretaceous periods since Red Deer River is well know for fossils from the Cretaceous period; think Dinosaur Provincial Park. Nice find!
  4. Diamond?

    The only places in the USA you will find Diamonds are: Arkansas, Crater of Diamond State Park, the Kimberlite district of NE Colorado along the Wyoming boarder (also into Wyoming) and East Tennessee in my old home of Roane County (source is a single kimberlite on the Clinch River, currently under a lake).
  5. Blue green mystery mineral

    Look-up the geology of the area where the sample was found. Usually there will be a listing of the minerals found in that area.
  6. I agree with AU Seeker, a Breccia with hematite cement. The clasts look like pieces of gniess but they could be limestone too. Check with a drop of acid or warm vinegar on a few clasts to see if they fizz.
  7. What is this thing???

    Looks like either quartz, ver Jasper or a iron nodal with hematite in the middle and a goethite rind.
  8. Mineral id?

    Looks like quartz and something else. Do hardness and streak tests for each distinct part of the sample and report your findings. Photos need to be sharper for the whole sample.
  9. Sodalite....florecent

    Those are some vivid colors in UV light. How long was the exposure?
  10. A big Happy New Year, 2018 to everyone one on the ROCKS, MINERAL and FOSSILS forum and to our host, Nugget Shooters Forum, a great big thank you for giving us rock heads a place to talk, share and ponder the wonderful world or Mineralogy & Petrology. May the new year bring to us all that perfect specimen that we have been looking for or at least a great place to dig holes. Salu
  11. hi all

    Looks like a fine grain limestone rock to me.
  12. Classification Help

    My best guesses solely from the photos, Photo #1: biotite with "purple" garnet. photo #2: iron stayed quartz photo #3: ore of some sort photo #4: rock - Biotite Schist with quartz and garnet photo #5: pyrite in quartz photo #6: quartz with iron stains and molybdenite (?) and molybdenum ocher (some of the yellow)
  13. What kind of rock is this?

    Not without using strong acids and having training in wet chemical analysis of minerals. Best bet is to take it to an Assayest and have them assay the sample or if you have a near by, community friendly college/university, you could take it to the chemistry department and they might test it for manganese for you.
  14. Rock sample from Albania

    Red-Desert, photos provide very little info. The suggestion given so far are our best educated guesses. One needs to run basic and advanced test on an ore sample to ID the minerals found within it. Basic test are Hardness, Streak & Specific Gravity of the minerals. Advanced test use strong acids & bases to get positive/negative reactions then there is X-Ray Diffraction analysis and spectral analysis of a sample; these last two are what Universities and mining companies use. If your friends really want to know what's in the rock, they need to take it to a mineralogist and have an "Assay" done on it.
  15. Rock sample from Albania

    Nice ore sample! When I see a mineral that is as red as that seen in the photos above the first mineral that pops in my head is Cinnabar, a mineral or mercury and the next is Realgar, an arsenic mineral. The photo is not very clear but there does look like some metallic, silver beads in places that would be mercury forming from the red mineral Cinnabar. Your friend will want to use caution & Personal Protective Equipment (PPE) when collecting these ores & handling the sample(s).