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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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    Silver Member

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

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  1. It s defiantly a Pyrite nodule. Do a streak and hardness test on a fresh "metallic" exposed portion, not on the dull yellowing-brown surface, to confirm for yourself.
  2. 4meter

    Help! ID please

    First off - Nice piece! Outer pink part looks like Rose Quartz or it could be pale Amethyst Quart, the blue layer below the pink looks like Chalcedony Quartz, the green layer at the small end, not sure what it is from these pictures.
  3. 4meter

    Help with Rock ID

    The depressions in the sample make me think it was melted & poured; the coloration reminds me of an alloy (2 metals melted together) of some sort. I'm going with Old Tom's "Babbitt".
  4. 4meter

    please help identify

    The second photo looks like a Basalt rock with the mineral Chabazite (pink mineral); photo 5 looks like a Basalt rock with the mineral Olivine (green mineral); last photo, material in back looks like weathered copper pieces, not sure what the middle sample is, the rock in the front, left looks like a Basalt rock or maybe an Andesite rock.
  5. It is an granitic rock; the black stuff is the mineral Hornblend and the red stuff is an iron rich mineral most likely derived from the chemical weathering of the Hornblend which is iron rich. Picture # 2 shows the classic shape of Hornblend crystals. This is a natural rock with no human manipulation or use of it at all. Archeology is a very interesting Science; please take the time to learn it.
  6. 4meter

    Worked stone from MA?

    Hi Greg and welcome to the forum. I think it is great that you have developed an interest in rocks and their use as tools by people in the past. Archeology is a fascinating science which has a wealth of publications on the making and use of stone tools. In order to understand what to look for and how to interpret the clues you need to get with an online Archeology forum and read through the post there. Even better, hook up with an Archeologist in your community. They are always in need of volunteers to help move dirt and in return you get to learn how to read a site and the objects found within. Your posted photos of the objects you have found are very nice geological specimens but I do not see anything that cannot be explained as natural fractured, splays and natural mechanical weather of the rocks. Like other posters have said, everyone sees patterns and pictures in the shape of clouds, even though there is nothing there, its just the way our minds work. the same can be said about the natural weathering of rocks. Stay curious, read about the subject, ask questions and learn about the science of Archeology. Who knows, one day you just might recognize a site of true importance and will know how to describe it and who to work with to investigate the site properly.
  7. 4meter

    Can anyone help me identify

    It could also be a piece of man made resin or pine tree resin.
  8. 4meter

    Mystery nugget

    Looks like a piece of slag from an industrial furnace. It is cool looking.
  9. 4meter

    A rock I found.

    GeoJack is right, there are many types of glass with many different properties. Jack should become the sites official glass guru.
  10. 4meter

    Unexpected find...

    Nice cleavage fragments! Nice to make unexpected finds like that one. Did you find any that were purple?
  11. Well, I will take a shot at it. Based on the photo alone, looks like quartz with Manganese coating. It's not an iron ore if it can scratch glass. See if the black can be rubbed or ground off & what color is under the blackish-purple coloration. Also, compare the unknown's "weight", as it feels in your hand, to a similar size piece of Quartz. If they "Weigh" the same, it points to the unknown being Quartz or a silica mineral. Let us know what you find out.
  12. All the reply posters are correct, just using synonyms for the same same stuff; Chalcedony, a hydrated, cryptocrystalline quartz. The white "rind" is the result of the loss of water from the minerals structure due to weathering.
  13. Based only on the photo and no other info, I'd say it is a Sandstone with layers of conglomerate. The holes and raised areas are the result of "differential weathering" caused by differences in harness of the minerals that cement the sand grains & pebbles together.
  14. I was wondering if any of you or the clubs were planning a trip to the above wash this Spring? I an interested in inspect the Lithium prospects of the area and would like to go with folks that know the area. I would be staying over a weekend before returning to Tucson. If you could let me know of any field trips planned I would appreciate it.