heres a legit machinist point of view, not to sound egotistical, but I do have degrees.

...and not to mention I've memorized all of Christopher Dunns work. Like him I have thousands of red flags in our "official" craftsmanship timeline. Tool marks, lathe marks, undercuts and thousands more.

enough about me.. WTF ARE THESE????

granodiorite I know contains more plagioclase than potassium feldspar in granite.

so a coarse-grained plutonic rock between granite and diorite in composition.

now if the geological integrity of this rock is "between" granite and granodiorite.

The only way to groove it.. is with diamond tooling..

Now wait before we get too excited, increasing geometrically is a fact that all new monolithic structures built in the ancient world are found to be way to big to be carried from certain distances (during X time period.) here in ancient Peru? was it? were looking at 600 A.D., with most dating to after 1,000 A.D. with some tipping the scales for possible at 160 tons.

heres something you would need to move a 150 ton object an inch off the ground.



Another thing... (GOD THESE GRANODORITE SPHERES ARE INCREDIBLE)

Now remember what granodiorite is, and the only thing that smoothly finish it successfully.

The larger the diameter of the ball, the more difficult and expensive it is to achieve fine quality. A hard, brittle material is easier, and therefore less expensive, to finish to a fine quality than a soft ductile material.
Even the force of gravity affects the ultimate quality achievable on large diameter balls. Rule of Thumb. For a ball of only 10" (250mm) diameter, made of a 300 series (18Cr 8Ni) stainless steel, the force of gravity at sea level will cause an unavoidable girth sag of 4.5 millionths of an inch (.114mm)(which is now why we can safely assume granite-diorite are the best contestants for being giant balls)
Although many of the large diameter balls we produce do not require extreme quality, we have produced 10" (250mm) and 12" (305mm) diameter stainless steel balls which were lapped spherical within 10 millionths of an inch (250nm). The quality of the metal itself and the force of gravity are two of the main limitations of the ultimate quality that can be achieved on large diameter balls.

Largest ball "we" made.

We were going to make it bigger, but to smoothly polish and to make it perfectly symmetrical.. you would need a machine like this.. only 600 times the size.

its almost impossible to perfectly polish anything larger than a golf ball with conventional tooling..

Ive seen most of these mystery balls, yes due to weathering, the pristine is gone. but there are some that completely shock me.

I was bored one night and started talking more about the "faliure with modern tech allegory" as far as Egypt having copper tooling, ropes and sticks.. I give the world a peice of my mind.. Thread: I am he who watches they. Ancient Machining Mysteries!