High speed core drilling and scooping of stone
When analyzing drill holes for machined attributes, the lapidary artist observes the inside walls of each drill hole. A drill hole with sharp 90-degree indentations along the inside wall of the hole is a strong indicator of high-speed machining.
(Above) Chlorite stone showing signs of high-speed tube drilling.
(Below) Alabaster vessel with high-speed machine marks made with a round tube. High speed drilling with a tube enables fast rock removal of stone vessels.
The shape of the tube is seen within the clean-cut scallop formations and smooth round drill holes. High speed tube drilling will have a slight taper in both the core and the hole.
Drill holes made in stone that have crisp round outlines are machined.
(Above) large precision-made core drill holes near the Volkonsky Dolmen.
(Below) extremely large precision-made core drill holes in Limestone (Cave Di Cusa).
Tube drilling on a large scale in Cave Di Cusa. Limestone outcrop with giant drill holes and cores.
The clean cuts and shaped round holes are created by a high-speed drilling tube.
The large round indentations in limestone rock are created with a giant high speed drilling tube. The shape of the tube is seen in rock.
(Above) A round metal tube will ultrasonically create a round drill hole in rock. Change the shape of the tube and the hole will follow the same shape.
(Below) A star shaped tube will ultrasonically make the same star shape in rock.
When using ultrasonics, a triangular tube will drill a triangular shaped hole in rock.
Multi-pointed drilling tubes will drill multi-pointed holes in rock.
Changing the shape of the tube changes the shape of the hole. Using a portion of a round drilling tube will create scoop like marks in the stone.
A shovel shaped tool will create scoop marks in rock. If not, gravity feeding the abrasive slurry over the work area, a trough can be created around the work area, where the abrasive in water is in continuous contact with the high-speed oscillating tool.
Once learning and using ultrasonics, a person can understand the ancient markings found all over the world
Ultrasonics cannot achieve all the mysterious markings created in prehistory, but it does explain all the drill holes and scoop markings found on this page.
Star shaped drill holes in rock are tubular inside because they are made with a star shaped tube.
Taking pictures of ancient drill holes and scoop marks in rock is helpful in spreading mystery.
Recreating the technology once made in stone is a step forward and a leap away from being in the mystery.
Today, with our advanced understanding of rock machining, nothing is impossible, especially if it was once created in prehistory.