Minerals & Geodes | November 11, 2026 at 8:00 PM

Timed auction by Alderfer Auction

Starts Oct 22, 2026 11:00 AM EDT. Ends Nov 11, 2026 8:03 PM EST

Bid now through Wednesday, November 11th. This auction will begin closing at 8 PM at a rate of 5 lots per minute. Active bidding will be auto-extended 3 minutes for each lot once it begins to close. Buyer’s Premium: 23% In-Person Preview by Appointment Only Monday, November 9th from 9:00 AM to 3:00 PM Tuesday, November 10th from 9:00 AM to 3:00 PM Schedule a Preview via preview@alderferauction.com or call 215-393-3000 Condition Report Requests | alderferauction.com/condition-report Pick-Up Successful Bidders will be notified to schedule a pick-up following the auction. Pick-Up Location Alderfer Auction 501 Fairgrounds Road Hatfield, PA 19440 Shipping Third party shipping is available for this auction. Please contact shipping@alderferauction.com or see our terms and conditions for a list of recommended local shippers. Please check our website frequently for updates. NOTE: We reserve the right to adjust auction information and dates.   The Mineral & Geode Auction features an extensive selection of natural mineral specimens, crystal formations, geodes, polished gemstones, and geological collectibles from locations around the world. The collection includes individual display specimens, mineral groups, colorful crystal clusters, and polished stones, with examples from North and South America, Europe, Asia, Africa, and Australia. Mineral specimens include orpiment, cavansite, epidote, proustite, fluorite, tourmaline, crocoite, barite, celestite, titanite, wulfenite, vivianite, vanadinite, muscovite, and pargasite. Additional offerings feature spessartine garnet, lazurite, kyanite, stibnite, copper, and quartz in a variety of natural crystal formations. Many specimens are identified by their original mining locations, providing geological and geographical context. Notable examples include cavansite from the Wagholi Quarry in India, crocoite from Tasmania's Red Lead Mine, orpiment from Nevada's Twin Creeks Gold Mine, and wulfenite with mimetite from Mexico's Ojuela Mine. Other specimens include vivianite from Minas Gerais, Brazil, celestite from Michigan, and vanadinite, proustite, and other minerals from Morocco. The collection also features mineral specimens from Afghanistan, Myanmar, Russia, China, Canada, and the United States. Quartz and crystal formations form another substantial category, including amethyst, citrine, smoky quartz, rose quartz, and clear quartz, along with specimens incorporating black tourmaline, epidote, and pyrite. A large citrine quartz geode from San Luis Potosí, Mexico, crystal clusters on display bases, and natural formations with contrasting mineral growth are among the offerings. Metallic minerals include numerous pyrite cubes, crystal clusters, and matrix specimens, alongside native copper, stibnite, and mixed metallic mineral formations. A cubic pyrite crystal cluster from Cerro de Pasco, Peru, and additional examples of pyrite combined with quartz illustrate the variety of crystalline structures represented. The auction also includes boulder opal, polished Baltic amber with inclusions, charoite, ocean jasper, labradorite, lepidolite, rhodonite, and petrified wood. Agate and decorative stone offerings encompass polished slices, palm stones, tumbled specimens, carnelian, and banded jasper. Stromatolite specimens appear in both polished stone and slab forms, alongside other natural geological materials. Collectors will also find mineral reference books and publications, including assortments of Rock & Gem and Rocks & Minerals magazines, as well as geological reference material and auction catalogs relating to mineral collecting. The selection brings together raw crystals, geological specimens with documented localities, polished ornamental stones, and display pieces suited to mineral collectors, geology enthusiasts, and natural history collections. Read More: Nature's Geometry: The Remarkable World of Pyrite Crystals

Lots

Showing the first 100 of 104 lots.