Calcium source

[Christel]

Looking for vitaminless calcium, I came across Thrive brand, supposedly for hermit crabs, and other shelled critters. Is this ok for the chameleon? I couldn't find a value of phosphorus, so not sure if it's in there or not.
Another alternative I'm thinking of, is eggshells... Does anyone know phosphorus content of them?

 

[Christel]

Durn, trying to delete this. Advise, please.
Thank you