Early technique in cutting stones

Discussion in 'General Science & Technology' started by arauca, Jan 11, 2012.

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  1. river Valued Senior Member

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    but in Egypt.....
     
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  3. Trippy ALEA IACTA EST Staff Member

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    What part of Cut, and then smoothed and polished, is unclear to you?
     
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  5. river Valued Senior Member

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    but could it polish diorite
     
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  7. Trippy ALEA IACTA EST Staff Member

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    But in Egypt, they also had access to high grade metamorphic rocks (Gneiss) which are capable of producing gemstones such as Garnite and Saphire.

    Plutonic rocks (such as granite) can produce bands of gemstones.

    And, finally, there is evidence to support the hypothesis that the egyptians might have had access to Emery (i've mentioned corundum a couple of times, emery is a form of corundum, it has a hardness of 9 on Moh's scale) through trade, or through native deposits.
     
  8. Trippy ALEA IACTA EST Staff Member

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    I wondered about that myself, but there was some mention in amongst there of the interior of the box, and I got the impression he was using to measure (among other things) the internal angles and the smoothness of the walls.
     
  9. river Valued Senior Member

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    interesting



    what evidence
     
  10. Trippy ALEA IACTA EST Staff Member

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  11. adoucette Caca Occurs Valued Senior Member

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    Well it got River to claim that the rock box had that level of precision, yet the article never actually says that it does.

    Indeed, the method he is shown using, just putting the square at one location for that picture, isn't clear enough for us to know how close to square the rocks are, and more importantly, how much they vary across a side.
     
  12. Trippy ALEA IACTA EST Staff Member

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    You mean aside from the fact that some Aswan sands are up to 15% emery?

    It was mined on an agean island (I forget which one, might be Naxos), it is known to have been exported from there, and is known to have been imported into the region during the Third Dynasty of Ur (I seem to recall there are records of as much).

    Also, Emery has a density of 3.3-3.8 as opposed to 2.59-2.63 for quartz, so if you have a sand that's rich in emery, you can increase the degree of enrichment using nothing more than water (the quartz and emery settle out at different rates, alternativly, you can use a flume with riffles in the bottom, similar to what they do for gold.
     
  13. river Valued Senior Member

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  14. Trippy ALEA IACTA EST Staff Member

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    Of course you don't, because you don't understand what polishing actually is.
     
  15. river Valued Senior Member

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    so this site didn't really explain , polishing did it
     
  16. Trippy ALEA IACTA EST Staff Member

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    That's not why I posted the link.

    The link demonstrates that copper tools can be used to cut diorite when used in conjunction with sand. It's the same principle as using gemstone tipped saws.

    The point that you're missing, however is this:

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    Anything that can be used for cutting, can also be used for polishing, it's simply a matter of how it's applied.
     
  17. river Valued Senior Member

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    Trip

    its abit of a stretch

    copper and sandstone

    copper is very soft for one thing
     
  18. adoucette Caca Occurs Valued Senior Member

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    Yeah, figuring it must of been aliens isn't a stretch though?
     
  19. Trippy ALEA IACTA EST Staff Member

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    Take it up with the experimental archeologists who have been able to replicate the results.

    Or do you dispute the evidence that we have?

    And it was sand that was used in conjunction with the copper, not sand stone.
     
  20. river Valued Senior Member

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    look , I know this alien perspective and truth really would produce a back lash ,

    its natural

    I have no problem with this

    but we have to come to terms with the fact that Ancient History , B.C.E. is there

    this History is not a joke , it is serious accounts , about our deeper past , there archaeology , that proves this

    now we can either face this Hisotry as it is and not take it as a mythology

    or explore and understand this part of our history and respect it
     
  21. Trippy ALEA IACTA EST Staff Member

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  22. Trippy ALEA IACTA EST Staff Member

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    Spouting woo about aliens is not respecting it. It's disrepespecting the skill and ingenuity of the egyptian artisans.
     
  23. river Valued Senior Member

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