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About BigSkyGuy

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  1. Hi FlyFish, How deep underwater can it go (3m? 10m? 60m?). Also, can you do a video showing how it works in black sand? Thank you.
  2. Here are some MS values for minerals from the same table. Nice collection of hot rocks Alexandre! Thank you for inventing the Impulse AQ! Mineral Magnetic Susceptibility Range (10-6 SI)1 Pyrite 35-5,000 Pyrrhotites 460-1,400,000 Hematite 500-40,000 Maghemite 2,000,000-2,500,000 Ilmenite 2,200-3,800,000
  3. Thank you for clarifying this Steve. I would also like to point out that the black sand on Hawaii beaches may be different from the typical black sand layers found on quartz sand beaches (the material which Steve has defined above). If I am not mistaken the black sand beaches in Hawaii are composed of sand-sized basalt.
  4. Many of you have expressed a desire to know how well the Impulse AQ will function for land use. One option is to wait until the unit is released. I know, no fun! The other option is to analyze the information we do have on the unit and on PIs in general, combined with information from the scientific literature and various forum posts. I have done such an analysis which is a bit long, but I will summarize the findings followed by how I arrived at the conclusions. The places where I believe the unit will be effective include the following: Black sand beaches (mainly coarse unweathered
  5. Very interesting find and analysis GB. The proper identification of finds is half the fun of this hobby!
  6. Hi GB, What I think you have found is a clad quarter which was minted with a poorly bonded planchet. Prior to minting the nickel layers of the sandwich are bonded to the copper layer creating the sandwich. When impurities are present between the layers, the bonding process is ineffective. Sometimes the layers separate prior to coining (stamping the impressions), resulting in a copper colored coin on one or both sides. These types of mint errors are quite rare and valuable. In your case, I believe the bonding was weak and separation of the layers occurred after coining, resulting in a blan
  7. Simon, I have noticed this as well, particularly for one particular site. My theory is that the copper leaches from the coin into the soil moisture. The copper solution is toxic to the bacteria and fungi responsible for the decay of the grass fibers, preserving the grass. At this same site I have also noticed that copper coins come in what I call "coin clumps", in which the coin is weakly cemented into a copper-stained clump of soil. I believe the copper solution evaporates in the dry months depositing the copper cement (possibly malachite?). This does not occur with the silver coins.
  8. Here is an article that I wrote for Lost Treasure magazine before it went under that you guys (and gals) may be interested in. Not sure how to bring in the photos, but here is the text. Do Coins Really Sink? Charles Darwin’s Contribution to Metal Detecting By Kent Whiting During my 30+ years metal detecting I have often wondered how coins become buried in the ground and what determines how deeply these coins are buried. There are two main theories; the first advocating that coins sink through the soil and the second that coins become covered by plant matter that deca
  9. Very much appreciated Mike. You have some great tips in there. Look forward to seeing your finds.
  10. I am considering a Gold Kruzer for jewelry hunting. Mike, I know you were on the search for the ultimate "micro machine". How do you like your Gold Kruzer now that you got all of the issues worked out? Is it hitting the stud earrings and chains? Input from other would be appreciated as well. Thank you!
  11. Did the conversion hardware for the Equinox come with the Golden Mask telescopic shaft? Thanks.
  12. I will have the EQ800 with me as well, so I will have some options. I will let you all know what I come up with. Thanks
  13. Thanks for the advice. I think I will take the 11" DD, 5x10" DD, and 11" AI. I also have an Equinox 800 to take.
  14. Gerry, Wow great find. I think I would attribute the "L" to "Company L", but I am no expert. Congratulations!! BSG
  15. Hello all, I am gearing up for a relic hunting trip in the southeast US. I have permission at a nice CW camp, that I used to hunt over 30 years ago with my White's 6db and 5000-D. I think this would be a great place to take the GPX-5000 (nice red dirt). However, a power line runs right through the middle of the camp. This was a minor issue for my White's vlfs, but may be a bigger issue for a PI. I have two AI coils, an 11" and a 14" inch which work great for the EMI which typically occurs around, or in, houses. However, I have never tried them beneath or near a power line. I want to make
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