Liquefying blood relics are Christian relics, primarily in Campania, Italy, that are reported to undergo periodic transitions from an apparently solid state to a liquid state during religious observan
Cardinal Crescenzio Sepe during the rite of the liquefaction of the blood of Januarius.
Ampoule associated with Januarius.
Tabernacle said to contain the blood of Pantaleon, located behind the side altar of Mary of the Assumption and Pantaleon at the Ravello Cathedral
Drawing of the reliquary containing the two ampoules said to hold Januarius' blood, c. 1860
Thixotropy is a time-dependent shear thinning property. Certain gels or fluids that are thick or viscous under static conditions will flow over time when shaken, agitated, shear-stressed, or otherwise
Liquefying blood relics
…Natural explanations have been proposed and demonstrated for such liquefaction. These include: Thixotropy, in which a gel-like substance becomes fluid when agitated. This is doable using the period's materials and techniques. French physics professor Henri…
Mānuka honey is an example of a thixotropic material.
Quicksand on the shore of the River Thames. Quicksand demonstrates thixotropy in the form of shear thinning, in that it is solid when at rest, but quickly liquefies when agitated.