In this research synthesis of hydroxyapatite (HAp) was carried out using Geloina coaxans shells as calcium precursors and (NH4)2HPO4 as phosphate sources through variations eggshell membrane mass (MCT) assisted of microwaves. Hydroxyapatite (HAp) is can be used in the medical, adsorbent and catalyst fields. Analysis of X-Ray Fluorescence (XRF) shows that the main chemical composition in the Gel…