Shell waste from culinary industry still can be reprocessed for further uses. Shell is a part of organism body which deposit mineral such as calcium and leads in poultry and bivalves. These high mineral content makes shells as an alternative option of calcium source in pharmaceutical industry. Shells, not only become calcium deposit but additionally it’s a place to store heavy metal contaminants. In processing food and medicines, the materials used are expected to have very low levels of pollution. This study aims to find sources of calcium with very low level of lead contamination through the use of chicken eggshell waste, duck eggs and blood clams from the culinary industry around Jakarta. The study was conducted from May to October 2018. The samples of each shell were taken randomly from 12 culinary industries in Jakarta. Sample preparation and measurement of calcium and lead levels were carried out using Atomic Absorption Spectrometry (AAS) at the Esa Unggul University Integrated Laboratory. The analysis shows that duck eggshells have the highest calcium levels, but not significantly different from blood clams. Lead levels in all three types of shells were <0.2 ppm and did not differ significantly from each other. Based on these results, duck eggs can be  used as the best  source of calcium.