Geology Superstore
Geology Superstore

Fluorite Octahedron – Illinois

Fluorite octahedron crystals from southern Illinois, USA. These mineral specimens are around 7 – 15 mm in size and available in three colours, clear, blue or purple and all are translucent, allowing some light through, giving them a gem quality colour and appearance. These octahedron crystals, while genuine fluorite have been cleaved into these shapes, a practice which has been practiced from some 200 years and still continues to this day with fluorite crystals from China. Due to the small size, these samples will come supplied in a x4 magnifier box.

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    We ship to all 50 states, Washington DC.
    All orders are shipped with a UPS tracking number.
    Always free shipping for orders over US $200.
    During sale periods and promotions the delivery time may be longer than normal.


    Elessi will accept exchanges and returns of unworn and unwashed garments within 30 days of the date of purchase (14 days during the sales period), on presentation of the original till receipt at any store where the corresponding collection is available within the country of purchase.

    Your return will usually be processed within a week to a week and a half. We’ll send you a Return Notification email to notify you once the return has been completed.
    Please allow 1-3 business days for refunds to be received to the original form of payment once the return has been processed.


    Give us a shout if you have any other questions and/or concerns.
    Phone: +1 (23) 456 789

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Fluorite octahedron crystals of varying colours from Illinois, USA. These individual crystals are available in various sizes around 7 mm in for small crystals and around 15 mm in for larger crystals and while they are genuine fluorite, they have been cleaved into these octahedron shapes which is done due to the fluorite minerals points of cleavage which allows it to ‘break’ in four directions. Despite this, they still exhibit, excellent, almost gem quality clarity with very minor inclusions. Such crystals from Illinois are now difficult to come by these days as the fluorspar mines in the areas have long since ceased operations, causing supply of crystals to be exhausted. The crystals are available in three colours, clear, purple and blue, with the purple and blue colourations being attributed to various impurities mentioned earlier, and all are translucent, allowing quite an amount of light to pass through which further enhances the gem quality. It is understood that these particular pieces of fluorite formed during the Jurassic period, 150 to 200 million years ago, when water within the earth percolated (flowed) through rock which formed during Mississippian stage of the Carboniferous period, some 358.9 to 323.2 million years ago, when water containing the fluoride as a dissolved chemical from deep within the earth were deposited within faults and fractures within the local country rock (limestone in this case), the conditions were ideal, allowing the fluoride to crystallise into fluorite veins and deposits. Due to the small size of these crystals, they come supplied in a small x4 magnifier box and label for ease of viewing.

Weight 60 g
Crystal Size and Colour

Blue – Small, Clear – Small, Purple – Small, Blue – Large, Clear – Large, Purple – Large

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