semi-precious gemstone night cairo dark blue natural aventurine stone on a light orange background close up

semiprecious jewelry gemstone aventurine gemmology geology stone macro texture glittering background nature rock mineral natural gem object ornamental blue polished sample specimen surface pebble tumbled glass goldstone geological collection gemological decorative textured small violet little artificial piece gemology material red synthetic dark gemmological cutout isolated shooting white black semi-precious night cairo light orange close top view