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4. The abrasive used was either emery, corundum, or diamond in conjuction with a vehicle such as olive oil.
originally posted by: anonentity
a reply to: scrounger
The problem seems to be that the older the artefacts the more precise the artifacts seem to be, Some of the vases and bowls with the finest work appear to be pre dyanistic when you come to bowls made of diorite, and the circular saw marks made on some stones , you have to ask does ceremonial artwork or bowls require such precision, or was the precision just a matter of fact way of doing things for this culture.Then just marveled at in the later ones.
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originally posted by: AdmireTheDistance
"High technology", yet they could only cut 1/100 of an inch at a time?
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originally posted by: carsforkids
a reply to: Trueman
An anchor possibly? Nevertheless an amazing find.
originally posted by: Iconic
a reply to: Phage
It's the only sauce because they know it doesn't explain anything. The core that was found from one of these cylindrical drill holes shows tooling marks consistent with a cutting edge that cuts all the way down in a spiral. You simply do not get these marks by using a hard edge with sand, or another medium, or crushed diamond or any other thing.
It appears to be a hollow, cylindrical drill head, with a very hard, pretty fine tip. Egyptians did not posses such tools or machinery. I've looked into this particular phenomena a bit and it's definitely interesting.
There was one guy near the turn of the century down in egypt who wrote about the core (he was the one who found it) and postulated on it... and the photo of the core is interesting in that when it is published online, they rotate the image ever so slightly, so the spiraling tool marks appear to not be spiraling, but round and each mark being separate from the next.