exquisite rectangular cut dark amethyst gemstone with intricate inclusions and rich purple hue captured in detailed

amethyst gemstone rectangular cut dark purple hue intricate inclusions detailed focus shiny polished precious stone mineral natural macro closeup clarity faceted elegant jewelry design quartz highquality reflection luxury accessory fashion purplestone raw crystal beauty vibrant monochrome texture surface geology collectible rare brilliant light shadow facet decoration allure refined color gleam ai generated