Multi-layered or core/shell structured zeolites and processes of making the same are disclosed. The zeolites can include a first zeolite having a first silica (SiO2) to alumina (Al2O3) ratio (SAR) and a second zeolite that is in direct contact with the first zeolite defining an interface between the first and second zeolites, the second zeolite being a pure silica zeolite or having a second SAR ratio that is different than the first SAR ratio, wherein the silicon (Si) and optionally aluminum (Al), if present, in the second zeolite is from the first zeolite, and the first and second zeolites are different zeolites.