Cave-in-Rock Hardin County Fluorite
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Cave-in-Rock Hardin County, Illinois has a long history of producing some of the worlds finest
fluorite specimens. There were many mines in the Southern Illinois/Northern Kentucky area but 3
mines became very famous to Rockhounds due to the many forms of fluorite found there.
The three best known mines are the Minerva Mine which was sunk in 1942 and is 680 feet deep.
The Denton Mine is 640 feet deep and was put into operation in 1981 while the Anna Belle Lee
Mine was brought on line in 1984 at a depth of nearly 1,000 feet. Due to the tilt or dip of the rock
units, some places in the mines are 1200 to 1300 feet below the surface. These mines have
been closed for some time now. Although we hear that there is a mining company boring a new
mine, we have seen no fluorite from that location as of yet.
Fluorite is a widespread and common mineral. It often occurs as a primary mineral in veins or as
a mix of lead, zinc and silver ores. Fluorite is also found in sedimentary rocks such as limestones
and dolomites as well as in igneous rocks such as granites. Fluorite occurs commonly as cubic,
octahedral and dodecahedral crystals in many different colors ranging from colorless and
completely transparent to yellow, green, blue, purple, pink or black. Crystals may be large and
penetration twins are fairly common. “Hoppered” specimens are in great demand. Fluorite may
glow blue or violet in SW or MW ultraviolet light.
Rare!!! Large Old Stock 1960's collection piece of Dogtooth Calcite on Stepped Cubic
Fluorite from the Cave-in-Rock District, IL
This great piece has distinct Purple Fluorite zoning. The result is a specimen that looks light
purple. This piece is hoppered with slight damage to 1 corner and 1 edge. This is an excellent
large cabinet display piece! These are the favored specimens of collectors. Most of the fluorites
that came from the Cave in the Rock area are much smaller, normally about 2 to 3 inches
maximum because they were smuggled out of the mines in lunchboxes or pockets. The large
specimens like this are extremely rare and highly in demand. These are all part of 40 to 60 year
old collections from when the mines first opened.  This one was collected in the Cave-In-Rock
District of Southern Illinois back in the 1960's.
It weighs in at
5 lbs 11oz (2.6kg) and measures 6.8 x 6.3 x 3.7" (17.4 x 16.1 x 9.4cm). The
largest Calcite piece measures
2.2 x 1.1" (5.6 x 2.9cm)
There are at least a dozen dogtooth calcites on this specimen plus many small formations below
the large calcite and on many ledges as can be seen in the photos.
ITEM# FLO05119388
2 1/4 lbs Purple Phantoms
in Yellow Fluorite from
Cave-in-Rock Hardin
County Illinois

Beautiful stepped purple phantom fluorite XL crystal!  These are highly sought after by collectors of the fluorite from the
Cave-in-Rock area of Hardin County, Illinois. This gorgeous piece has distinct large steps covered in multiple layers of cube
steps. There is some slight damage to a few edges but nothing that detracts from the beauty or value of this Old Stock
Specimen. Light Purple phantoms on the cubic edges as seen in the photos. This piece came from a 1950's estate collection
in Illinois.

This specimen weighs 2.25 lbs (1018g) and measures 5.5 x 4 x 2 inches ( 13.9 x 10.2 x 5.2cm)
ITEM# FLO08105690
Old Collection! 1950's
Fluorite covered with Calcite
Spires from Cave-in-Rock, IL

Finding an old fluorite specimen from the Classic and Famous Cave-in-Rock District in Hardin County
that is so fragile and obviously from a brand new find area in its day is a true treasure!

We got this specimen from an estate sale in Michigan along with several other exceptional specimens.
This collection is from the 1950's era as evidenced by the foam mount and typed label installed with
straight pins. The specimen was glued into the foam many years ago and has since disintegrated the
foam next to the glue. The specimen lifts off the foam base but also sets back on it fairly stable.

This is the first fluorite specimen we have seen from this locale with these calcite Spires. Spires are
much like "dogtooth calcite" formations but form more randomly and in opposing directions to each
other. The fluorite is a pale yellow with slight purple wisps. The spires are white coated clear calcite.

This specimen weighs 0.5 lbs (228g) and measures 3 x 2.1 x 2.6 inches (7.7 x 5.4 x 6.6cm)
ITEM# FLO051304971
5 lbs Rare Old Stock Dogtooth
Calcite on Stepped Cubic
Fluorite from Cave-in-Rock
Hardin County Illinois

ITEM# FLO05074974
Fluorite on Barite Matrix from
Cave-in-Rock, IL


An Excellent Old Stock Personal Collection
Specimen of Cubic Fluorite on Barite from the
famous Cave-in-Rock District of Hardin County, IL

This specimen weighs 10.4oz or 0.65 lbs (295g) and
measures 2.9 x 2.3 x 1.8 inches (7.4 x 6 x 4.6cm)
With Crystals as large as 0.98" (24.9mm)
(Label base included)
ITEM# FLO08149983
Fluorite with Sphalerite Vein from
Cave-in-Rock, IL


An Excellent Old Stock 1950's Specimen of Fluorite with a Sphalerite vein,  from the
famous Cave-in-Rock District of Hardin County, IL. The vein is visible from 2 sides.
The specimen is glued to styrofoam and is leaning but is still attached to the base.
Note the 1050's mount and nametag.

This specimen weighs 5.8oz or 0.36 lbs (165g) and measures 3.2 x 1.9 x 1.5 inches
(8.2 x 4.9 x 3.8cm)
(Label base included)
ITEM# FLO061700221
Yellow and Purple Zoned Cubic
Fluorite from the Minerva Mine,
Cave-in-Rock, IL

This is a superb specimen, from our personal collection. It is a large
cabinet piece of multiple zoned cubic fluorite crystals, up to 2.3” (5.9cm),
with a golden yellow color edged in purple. The crystal is translucent, which
shows off the purple phantoms, and the surfaces are matte finish and
beautifully stepped (hoppered). Viewed from the sides, or when backlit,
the purple edges really stand out. There are very old corner chips, normal
for a large piece this old, but they present no distracting damage. We have
had this specimen in our collection for over 30 years. It is from the Minerva
No. 1 Mine, Cave-in-Rock, Hardin County, Illinois. The Minerva mine was
located in the Illinois/Kentucky fluorospar district. It was the largest orebody
in that district.  Discovered in 1940 it was mined off and on until 1996.
Many spectacular specimens have come from this mine over the years.
This is a Classic Specimen from a Classic Locale!

This specimen weighs 81.9 oz or 5.6 lbs (2.322kg) And measures 6.5 x 5.6
x 3.4 inches (16.7 x 14.3 x 8cm)
ITEM# FLO08142805
Fluorite with Quartz and
Sphalerite from the Deardorff
Mine, Cave-in-Rock, IL


An Excellent Old Stock Personal Collection Specimen of Fluorite with Quartz and
Sphalerite from the Deardorff Mine, Ozark-Mahoning Group, Cave-in-Rock
Sub-District, Illinois-Kentucky Fluorspar District, Hardin County, Illinois

This specimen weighs 7.2 oz or 0.45 lbs (206g) and measures 3.5 x 2.2 x 1.3 inches
(8.8 x 5.6 x 3.4 cm)
ITEM# FLO081499011
Fluorite, Sphalerite and Galena
from the Hardin County, Illinois


An Excellent Old Stock, Personal Collection, Two Sided Display Specimen, of
Fluorite with Sphalerite and Galena from Hardin County, Illinois. This piece has two
distinctly different personalities depending upon which side is facing up. This is one
of our favorite display pieces!

This specimen weighs 22.9 oz or 1.43 lbs (651g) and measures 5.5 x 3 x 2.4 inches
(14 x 7.8 x 6 cm)