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Relative supersaturation for calcium oxalate monohydrate

Q: I came across the relative supersaturation for calcium oxalate monohydrate (Ca₂C₂O₄.H₂O) as 1.2. How does one come up with that figure? How was it calculated?

A: Relative supersaturations cannot be calculated since they depend on many parameters such as agitation, vessel configuration, the existence of crystals (and the amount), method by which the supersaturation is generated (reaction, etc.).

There is danger in applying a literature source to a particular application. As a side note I am surprised that the value quoted is so low since the oxalate is usually created by a reactive crystallization and precipitation route.