Biomimetic features of modern biomaterials are important when designing new materials for tissue engineering. When it comes to development of new bone engineering material most of the material scientists mimic the composition (phase, chemistry), appearance (shape, size) and biological behaviour (biocompatibility, bioactivity) of both particles and monoliths for the specified application. Bone is composed of calcium phosphate (CaP) nanoparticles that resembles composition of ion-substituted hydroxyapatite with low crystallinity. Crystallinity of inorganic biomaterials is usually not considered a top priority property when designing new tissue engineering system. Our work is aimed on development of biomimetic CaP nanoparticles with variable crystallinity degree to suit patient specific needs.