Amethyst druse crystal seamless rotating on black background. macro detail texture background. close-up raw rough unpolished semi-precious gemstone Amethyst Geode Crystal 3 Dolly Shot and Selective ...

All of these properties were consistent with amethyst. What made this example notable was a strikingly large primary fluid inclusion under the table facet, which is easily seen with the unaided eye ...

The Anahí mine, Bolivia, has produced large amounts of amethyst, citrine, and amethyst-citrine for ... conditions under which these quartz crystals formed, although the crystal chemical properties ...