Brazilian Amethyst Geode Slice on Polished Banded Stone BaseSwisher Bros. Auction LLC4.4(275)$5Aug 30, 2026
(3) Decorative Mineral & Crystal Specimen - Selenite, Amethyst, SerpentineSarasota Estate Auction4.6(666)$50Aug 29, 2026
Black Tourmaline (Schorl) Crystal Cluster SpecimenCol. Christie Hatman Auctioneers4.3(544)$51 day Left
Quartz Geode Specimen with Crystalline Interior ROCK STONE LAPIDARY SPECIMENCol. Christie Hatman Auctioneers4.3(544)$55 days Left
Black Tourmaline (Schorl) Crystal Cluster SpecimenCol. Christie Hatman Auctioneers4.3(544)$52 days Left
