In Chronic Diseases - Anti-psoric Drugs, see how CALCAREA CARBONICA is prepared:
"Break in pieces a clean, somewhat thick oyster shell, take one grain of the softer, snow-white calcareous substance found between the outer and the inner harder shell. This is prepared in all the degrees of potencies up to X in the manner directed as to the preparation of dry medicinal substances for homoeopathic use, given at the conclusion of Part I. This is preserved from sunlight and great warmth, to be used for its various purposes".
That means, CALC CARB is the middle layer of 'oyster shell', a part of 'biological tissue', which belongs to animal kingdom. It contains not only calcium carbonate, but various biological molecules. HOW CAN WE CONSIDER 'CALC CARB' AS A MINERAL DRUG?
Since it is procured from animal tissue (middle layer of oyster shell) , I think it should be considered as 'animal drug', exactly similar to CASTOR EQUI (Rudimentary Thumb-nail of the Horse). We know Conchiolinum (Mother-of-Pearl) and Ova Tosta ( egg shell) also belong the category of ANIMAL ORIGIN, similar to CALC CARB. It would be more appropriate call CALC CARB as OYSTER SHELL.
Calcium carbonate is a chemical compound with the formula CaCO3. It is a common substance found in rocks in all parts of the world, and is the main component of shells of marine organisms, snails, coal balls, pearls, and eggshells.
To process calcium carbonate from oyster shells, first we have to make Calcium Oxide or quick lime by subjecting it to thermal decomposition.
Then, calcium carbonate is made by mixing calcium oxide into water, and then bubbling carbon dioxide into the solution.Water is added to give calcium hydroxide, and carbon dioxide is passed through this solution to precipitate the desired calcium carbonate, referred to in the industry as precipitated calcium carbonate.
How can you say 'the middle layer of oyster shell' potentized without any such processing is pure Calcium Carbonate, and is a 'mineral kingdom' drug. We can only say it is an 'animal kingdom drug' containing calcium carbonate. No doubt, it will contain various other biological molecules also, since it is an 'animal tissue'.