polished iolite gemstone closeup for jewelry and gemology posters

polished iolite gemstone closeup jewelry design gemology poster blue violet crystal mineral natural stone raw gem sparkle faceted beauty mineralogy gemologist precious semiprecious clarity reflection transparent cut shine luxury elegant rare unique geology earth specimen rock crystallography jewel decoration adornment glossy light detail macro craftsmanship aesthetic artisanal handmade gift collectible valuable investment ornament brilliance radiance jewelcrafting lapidary refined iridescent glimmer ai generated