Tag: fluorite
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2026 ESCONI Gem, Mineral, and Fossil Show – Preview #39: Fluorite and Sphalerite
One last chunk of beautiful fluorite… nice purple crystals on a bed of sphalerite. Sounds and looks tasty! If you are up this late (or is that early), you deserve a tasty preview… just a few hours until the show starts!
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2026 ESCONI Gem, Mineral, and Fossil Show – Preview #36: Purple Fluorite from Cave-in-Rock, IL
Here’s yet another beautiful chunk of fluorite from Illinois. This one is purple and was collected from Cave-in-Rock, IL. many years ago. Come and see it tomorrow… less than a day away!
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2026 ESCONI Gem, Mineral, and Fossil Show – Preview #24: Yellow Fluorite from Hardin County, IL
We have some real nice pieces of fluorite for this year’s show. Here is a beautiful yellow specimen from Hardin County, IL. Tomorrow is the day… come on out!
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2026 ESCONI Gem, Mineral, and Fossil Show – Preview #19: Fluorite and Sphalerite
We have multiple pieces of beautiful fluorite for this years show. This is one of the best… it has large crystals of fluorite resting on sphalerite. Have I mentioned we are just a few days away from this year’s show?!?
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2026 ESCONI Gem, Mineral, and Fossil Show – Preview #9: Yellow Fluorite from the Minerva Mine
We have an 11 pound chunk of yellow fluorite for this preview. It’s likely from the Minerva Mine in Cave in Rock, IL. Here’s another specimen from the Minerva Mine sold at the 2025 show.
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2026 ESCONI Gem, Mineral, and Fossil Show – Preview #2: Fluorite, Galena, and Barite From Bingham, NM
This is the preview post #2 for the 2026 ESCONI Gem, Mineral, and Fossil Show Live Auction. The ESCONI Gem, Mineral, and Fossil Show for 2026 will be held on March 21th and 22nd at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year. All details can be found here. In…
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ESCONI November 2025 Mineral Study Group – November 1st, 2025 at 7:30 PM at the College of DuPage – “Fluorite”
The ESCONI Mineral Study Group will meet on Saturday, November 1st, 2025 at 7:30 PM in TEC 1038B at College of DuPage in Glen Ellyn. See Directions and Map below. The program will be on “Fluorite”. Southern Illinois was once a major producer of world-class fluorite specimens, primarily from Hardin County. While no commercial mining currently operates, you…
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Throwback Thursday #235: Field Trip to Rosiclare, IL for Fluorite
This is Throwback Thursday #235. In these, we look back into the past at ESCONI specifically and Earth Science in general. If you have any contributions, (science, pictures, stories, etc …), please send them to esconi.info@gmail.com. Thanks! Have you heard of the Fluorspar Festival? It’s held in Rosiclare, IL on the first weekend of October…
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2024 ESCONI Gem, Mineral, and Fossil Show – Preview #2!
This is the preview post #2 for the 2024 ESCONI Gem, Mineral, and Fossil Show Live Auction. The ESCONI Gem, Mineral, and Fossil Show for 2024 will be held on March 16th and 17th at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year. All details can be found here.…
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2022 ESCONI Gem, Mineral, and Fossil Show – March 19th – 20th, 2022 – Preview #2, Fluorite Crystal
This is the preview post #2 for the 2022 ESCONI Gem, Mineral, and Fossil Show Live Auction. The show is on March 19th and 20th, 2022 at the DuPage County Fairgrounds in Wheaton, IL. All details can be found here. This absolutely gorgeous multi-colored grouping of fluorite will be available in our Live Auction. It…
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2020 ESCONI Gem, Mineral, and Fossil Show March 21st and March 22nd – Preview #8, Fluorite
This is the preview post #8 for the 2020 ESCONI Gem, Mineral, and Fossil Show. The show is on March 21st and March 22nd, 2020. Show details can be found here. Here is a nice large specimen of fluorite, possibly from Colorado.
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2019 ESCONI Gem, Mineral, and Fossil Show March 23th and March 24th – Preview #10, Fluorite Crystals
Another preview of material for the live auction at the 2019 ESCONI Gem, Mineral, and Fossil Show… Fluorite Crystals.
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2019 ESCONI Gem, Mineral, and Fossil Show March 23th and March 24th – Preview #3, Fluorite
Another preview of material for the live auction at the 2019 ESCONI Gem, Mineral, and Fossil Show… Fluorite from China.
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October General Meeting on October 13th, 2017: Fluorite and Rare Earth Elements in the Illinois-Kentucky Fluorspar District
The program at our October 13, 2017 meeting will be presented by F. Brett Denny, Associate Economic Geologist with the Illinois State Geological Survey. His talk is titled “Fluorite and Rare Earth Elements in the Illinois-Kentucky Fluorspar District”. Please bring your best fluorite specimens to show the group!
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Micromineralogy Meeting: Sat. 5/9, Fluorescent Minerals
MicroMineral Meeting, Fluorescent Minerals, 7:30 pm, College of Dupage, Building K – Rm 131. Bring your samples! All are welcome! Photo by Hannes Grobe
