Recent content by Picasso

Found a definite chemical test using Feigl's solution: http://www.mindat.org/mesg-100-179708.html

Consistency of sand.

Calcium carbonate sample --> calcite or aragonite? Is there a definite way to determine whether a calcium carbonate sample is calcite or aragonite? The weak bond of aragonite should produce an active reaction with a weak acid such as diluted acetic (vinegar), whereas calcite will require a...