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21 specimens listed
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Fluorite - etched plate
stock #15.1-582
Minerva #1 Mine, Cave-in-Rock, Hardin County
Illinois, United States
7.2 x 6.5 x 2.4 CM (cabinet)
price: $290


Orange-yellow color Fluorite crystals with a few purple edges from Southern Illinois. The crystals have some amount of etching on some faces while others are smooth and glassy. Minimal rough spots, though not perfect the overall condition and color are choice. One of the more rare colors for an Illinois Fluorite, this piece dates to the 1960's.
Fluorite with Chalcopyrite
stock #13.1-123
Denton Mine, Harris Creek Sub District, Hardin County
Illinois, United States
6.6 x 6.1 x4.8 CM (cabinet)
price: $620


Dark purple-blue Fluorite that is zoned with yellow to orange cores that are best seen with a backlighting. Some faces are dusted with tiny Chalcopyrite crystals and most faces have a lustrous pattern of geometric regrowths. A few edges show modification patterns but most are sharp edged. The Denton Mine is a now one of the great classic localities for USA Fluorite, good specimens are getting very scarce and quite expensive. This is a nice example that is rather dark without backlight but really comes alive with a light behind it.
Fluorite- zoned with
stock #15.1-027
Denton Mine, Harris Creek Sub District, Hardin County
Illinois, United States
5.8 x 5 x 3.4 CM (cabinet)
price: $390


Remarkable dark purple Fluorite crystals that have a bright yellow core that is only seen inside the holes left by former Barite rosettes. These Barite holes have a distinctive structure, these are a waxy cone shaped void that shows the detail of the long-gone Barite crystals. These Barite holes are well known from the region but the color zoning on this one is unusual and is especially impressive when backlit. The Fluorite is overall dark, sharp and lustrous with some edge scuffs, so perhaps not for strict perfectionists. The main interest is of course the Barite holes up to 1 CM across that penetrate the inner bright yellow center of the Fluorite.
Barite with Fluorite (US classic)
stock #0307-JM-1632
Cave-in-Rock, Hardin County
Illinois, United States
7.9 x 5.8 x 3.7 CM (cabinet)
price: $1150


An outstanding classic that is rarely seen on the market. Sheaves of fine blue Barite crystals in radiating habit on a contrasting Calcite matrix. Fluorites are noted on the edge and backside, but the main impact is from the Barite. Ex John Marshall collection, this has the rare strong blue color, most Barites were a cream white to gray hue. In very good condition as seen, the piece is very three dimensional with top color and form. A fine addition to any good suite of southern Illinois minerals, US classics or Barites.
Fluorite -classic zoned crystals
stock #20.1-106
Minerva #1 Mine, Cave-in-Rock, Hardin County
Illinois, United States
6.4 x 5.6 x 4.8 CM (cabinet)
price: $1750
Spring 2020

A super blue to yellow-orange zoned Fluorite with excellent form and outstanding surface modifications. A modern American classic, this is a choice display quality specimen that has a main cube presenting a textbook perfect inset in the largest face. Careful examination will find a few very small edge rough points, which are almost inevitable. Overall however this is in very choice condition. The backside is the former point of attachment and is contacted there but the front is well developed. With backlighting this really glows. Hard to find good Illinois Fluorite of this color now except at very high prices. A good value for the quality, in person the color is a shade darker and a bit more blue than purple under most lighting.
Witherite on Fluorite
stock #20.1-083
Minerva #1 Mine, Cave-in-Rock, Hardin County
Illinois, United States
2.8 x 2.6 x 1.8 CM (thumbnail)
price: $140
Spring 2020

A complete ivory colored Witherite crystal sitting on a blue crystalline Fluorite showing classic form. From the famed Minerva #1 Mine, this is a well formed thumbnail specimen in very good condition. The faces of the Witherite have the characteristic tiny stepped structures that are so definitive for this locality.
Aragonite on Calcite on Fluorite
stock #19.1-363
Cave-in-Rock, Hardin County
Illinois, United States
6.3 x 3.9 x 3.3 CM (cabinet)
price: $170


An unusual old specimen from Cave in Rock, southern Illinois. Etched Yellow Fluorite with a hint of purple zoning is the matrix for a treelike spray of slender spikey Calcite crystals that are coated with secondary aragonite. Some of the Calcites have stair-stepped epitaxial growths along the prisms. Ex Larry Conklin with his label, This looks very much like some Minerva #1 mine specimens but Conklins laberl only lists Cave in Rock. A delicate, sculptural piece that is also somewhat fluorescent.
Witherite - fine US classic
stock #15.1-1060-(CN2017)
Minerva #1 Mine, Cave-in-Rock, Hardin County
Illinois, United States
8.8 x 6.7 x 4.1 CM (cabinet)
price: $750


An excellent old time USA Witherite with great form from the Minerva #1 mine. Classic early 1960s vintage. Ex Dufoe and Noll collections, with fat barrel shape crystals showing well stepped striations on the edges. This specimen also has a good light yellow-orange color and is much more attractive than the more usual plain white. Alston Moor in England and the Minerva mine, (all long closed) produced all of the fine Witherites ever found. Fine pieces like this are now only available from older collections and getting very scarce. This is an especially choice piece, has great wet look luster and displays great from several angles.
21 specimens listed
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