apatite blue crystal macro - semiprecious stone

aggregate apatite asia background beryl blue calcium closeup cluster cobble collection crystal crystalline decorative dioxide fluorapatite gemmology gemmy gemology gemstone geological geology glass glassy green hydrothermal isolated jewelry little lucent macro material mine mineral mineralogy natural nature object ornamental pencil phosphate phosphorite piece precious prismatic quartz rock rough sample semi semiprecious specimen stone structure surface texture textured tourmaline transparent treasure white