Cast, Not Carved · claim GEO-C571 · Mechanism rung · Recipes and replication experiments
Two pre-industrially feasible pathways — silica hydrogel from waterglass + NaHCO₃, and sol-gel precipitation from waterglass + ethanol — yield transparent binders that, mixed with granite powder, produce material passing visual and Mohs 6–7 hardness comparison with natural granite.
source anchor
Fóti Ch 10, pp ~258–267
Evidence
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an honest empty state
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