The natron chemical theory — molten natron softening granite for workers to pound with stone balls — doesn't hold up under scrutiny. Penetration depth would be only 1-3mm even with strong acids. No sodium silicate (water glass) residue exists at the site despite the theory requiring it. The massive charcoal requirements would be nearly impossible in a desert environment over 5,000 years. Experimental tests also failed to match real mark characteristics. The Unfinished Obelisk, Egypt
Natron Chemical Theory Ineffective for Granite Excavation

Key facts
- Natron theory proposes molten natron reacts with granite to create water glass, then workers pound with dolerite balls
- Molten natron penetration into granite is minimal - strong acids penetrate only 1-3mm under favorable conditions
- Chemical reaction would leave visible color changes and sodium silicate (water glass) residue at the site
- No sodium silicate residue exists at Aswan quarry despite the claim
- Method would require enormous amounts of charcoal in a desert environment with scarce timber for 5,000 years
- Experimental natron marks do not resemble the real Aswan scoop marks in size, shape, or edge characteristics
Site mentioned
Sources
The Granite "Mistake" - The Natron Theorynatrontheory.com
Which means if you can work on granite with molten natron, you can also work on these stone types as well. It's a total misconception to believe that ...
School History Books Are Wrong Or “A Better Way to Make Ancient ...tatiana-colligan.medium.com
A theory about etching stones, including granite, with Natron Salt, also called Soda Ash, also called Sodium Carbonate, also Na2CO3.
The Natron Theorynatrontheory.com
Natron is a kind of salt which was abundant in the Nile valley (now depleted). People have been hand-picking and collecting it in baskets since ancient times.
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