Connecticut Mineral Specimens For Sale

 

   

We have been lucky enough to acquire some of the finest examples of Connecticut minerals directly from the field collectors who have gained legal access to the active quarries as well as numerous older collections built in the 1960s through the 1990s.  If you are a serious East Coast or Connecticut collector it might be worth your while to contact us regarding better materials which we show by enquiry only.

 

 

 

OKJ-888

OKJ-888       Natrolite      Cheshire, Connecticut.  Ex. Paul and Dawne Dunning collection.  An interesting spray of acicular, clear crystals to 1.5 cm each.  Unusual location.  2.3 x 2 x 1.4 cm.  No damage.  Mounted in a perky box.    $25

 

 

 

 

 

 

OKN-598

OKN-598    Fluorite    Thomaston Dam Site, Thomaston, Connecticut.  Ex. Paul and Dawne Dunning collection.  Typical example as seen here.  This one is light purple measuring 2.7 x 2.1 x 1.4 cm.  No damage.  Closed location.  $20

 

 

 

 

 

 

OKL-166

OKL-166    Beryl     Gillette Quarry, Haddan Neck, Connecticut.  Ex. Dr. Steve Chamberlain Collection.  A 1.9 x 1.5 x 1.4 cm example that is double terminated (base is only partially terminated.  In good condition.  Light green color, high luster and minor gemmy areas.  Excellent for the location.  $45

 

 

 

 

 

OKL-800

OKL-800     Sphalerite and Quartz on Galena       Rt #25 Road Cut, Trumbull, Connecticut.  Ex. Thomas Fowler collection.  2.5 x 2.1 x 1.6 cm specimen with galena cubes to 1 cm on edge.  Bright translucent sphalerites on the galena with clear quartz points.  Galena corners look not to be fully formed... patina is consistent (I don't think this is damage but I might be wrong).  Mounted in a perky box.  Attractive and unusual and nice for the location.  $90

 

 

 

 

 

OKG-119

OKG-119     Apophyllite on Calcite and Quartz      Roncari Quarry Tilcon Quarry), East Granby, Hartford, Connecticut. 6 x 5.6 x 3.5 cm specimen with a nice mix of species.  The apophyllite balls rest on top section of calcite with quartz points.  Edge contacts and one spot with an apophyllite ball missing.  Not distracting, just not very noticeable at all.  A good example of less common material from this important find.  $145

 

 

 

 

 

 

 

OKG-098

OKG-098     Apophyllite on Datolite      Roncari Quarry Tilcon Quarry), East Granby, Hartford, Connecticut.  At attractive plate of transparent datolite crystals with balls of clear to white apophyllites.  Really nice luster.  Showy!  A very tiny cleave to a datolite in the center if piece.  Very minor damage for a large example like this.  This is an old timer from the early days of collecting at this locality.  13 x 8.5 x 3.5 cm.  $395

 

 

 

 

 

 

OKL-134

OKL-134    Sphalerite, Quartz     Trumbull, Connecticut.  Ex. Thomas Fowler collection.  A large, for the location specimen with small translucent sphalerites and milky quartz.  Good luster and no damage.  7.6 x 4 x 2.5 cm.  Mounted in a large perky box.  $150

 

 

 

 

 

 

OKL-135

OKL-135     Columbite      Biermann Quarries, Bethel, Fairfield, Connecticut.  Ex. Thomas Fowler collection.  A large, mostly complete crystal which appears to be twinned.  It measures 6 x 3.6 x 3.3 cm overall.  No damage just matrix contacts.  An unusual New England find.  $950

 

 

 

 

 

 

OKI-409

OKI-409     Apophyllite on Prehnite     Southbury, Connecticut.  Ex. Anthony Dunn collection.  The specimen seen here is a floater, less one very thin area of contact.  The contact is right by my thumb in the second image.  5.2 x 4 x 3.1 cm.  Great miniature for this locality.  The snow white apophyllites are nice for luster and form.  A good east coast or New England piece.  $70

 

 

 

 

 

 

OKG-020

OKG-020    Prehnite on Calcite Scepter      Roncari Quarry (Tilcon Quarry), Granby, Hartford County, Connecticut.  Hematite stained and green balls of prenite girdle the stem of this scepter.  The calcite is actually quite clear but the surface frosting and modifications make seeing into it difficult.  A few select faces are clear.  This one measures 6.7 x 4.5 x 4.5 cm.  Two very tiny touch marks are not distracting (could be oiled to hide).  $200

 

 

 

 

 

 

OKI-745

OKI-745   Chalcopyrite on Calcite and Quartz        Roncari Quarry (Tilcon Quarry), Granby, Hartford County, Connecticut.  Hematite stained and included calcites and quartz crystals make up this fine 9.4 x 5.2 x 4 cm piece.  This is basically one ling double terminated calcite of great complexity with a second calcite at one termination.  Several brassy chalcos to about 3 millimeters each.  Minor base contact, some minor healed surface area.  No damage.  The calcite is actually quite clear but the surface frosting and modifications make seeing into it difficult.  A few select faces are clear.  Fantastic example... fantastic quality, higher luster than the images indicate although most surfaces would be described as having a satin like luster, some are glassy.  $900

 

 

 

 

 

 

OKG-096

OKI-745   Calcite and Quartz        Roncari Quarry (Tilcon Quarry), Granby, Hartford County, Connecticut.  Beta form quartz crystals in small groups spread out over the entire surface of this specimen.  It measures 7.3 x 4.5 x 1.7.  The first generation quartz (and calcite) is yellow from hematite while the second generation, the larger clumps of crystals , are gray.  There is a rare butterfly twin lying on edge.. seen in lower left of first image.  Zero damage.  An unusual specimen for this location.  $285

 

 

 

 

 

 

OKL-132

OKL-132    Fluorite, Cerussite, Sphalerite    Trumbull, Connecticut.  Ex. Thomas Fowler collection.  Two cubes a green and a blue on a matrix coated by tiny cerussites and sphalerite.  7 x 4.4 x 2.1 cm with each cube being approx. .9 cm on edge.  The green cube had one side growing against matrix.  All corners on blue cube are not fully formed, I do not believe they are damaged.  Even the non-exposed corners show this same development.  A really good quality specimen for the location.  $175 

 

 

 

 

 

 

OKL-739

OKL-739    Prehnite    O & G Quarry, Woodbury, Connecticut.   Ex. Thomas Fowler collection.  A nice example in a perky box.  High luster with a few scuffs.  4.5 x 3.5 x 1 cm.  $15

 

 

 

 

 

 

OKL-737

OKL-737    Tourmaline in Cleavlandite    Strickland Quarry, Collins Hill, Portland, Middlesex County, Connecticut.  Ex. Thomas Fowler collection.  The tourmaline crystal is a nice green color, well terminated, and rests between the blades of feldspar.  It is 2 cm long, undamaged and has a slight curve.  The cleavlandited are chipped to expose the tourmaline.  A nice example in a perky box.   $40

 

 

 

 

 

 

OKAA-044

OKAA-044    Calcite, Quartz, Hematite    Roncari Quarry, (Tilcon Quarry), East Granby, Hartford County, Connecticut.  This fine piece came from what was dubbed the "Halloween Pocket".  It measures 12 x 10 x 5.2 cm overall with calcites to 6.3 cm.  The largest calcite in the center of the specimen is double terminated.  Many small hematite halos on the calcites and some of the quartz.  The only damage is one calcite being cleaved and it is not distracting.  Nice contrasts, luster and interesting form to the calcites.  Mounted on a custom engraved acrylic base but the piece stands well on its own in the same position without aid.  $625

 

 

 

 

 

 

OKAA-045

OKAA-045    Calcite    Roncari Quarry, (Tilcon Quarry), East Granby, Hartford County, Connecticut.  This is composed of two twinned crystals but the real noteworthy one is the large, double terminated crystal making up the bulk of the specimen.  The piece measures 8 x 5 x 4.9 cm.  The crystals are on a thin crust of matrix and it sits nicely without assistance.  The crystal is mostly clear internally but with its satin finish it is difficult to reflect this in the images.  Views nicely from all sides.  Damage free.  Crystals of this type were uncommon from the location.   Mounted on a custom engraved acrylic base.  Excellent value.  $350

 

 

 

 

 

 

OKAA-046

Back

OKAA-046    Hematite on Quartz and Calcite    Roncari Quarry, (Tilcon Quarry), East Granby, Hartford County, Connecticut.    This is definitely what a museum grade specimen from Connecticut looks like.  I hand it is a thing of beauty measuring 16 x 12.2 x 7.5.  It stands upright on its own and is amazingly aesthetic.   The calcites are the most common for the find however they are unusually large (to over 8 cm each) and have the satin luster with hematite included areas, also common to the find.  At a quarry such as this one that blasts, to see a specimen of this size without any notable damage is a rarity.  There are a couple very tiny marks but you will need to break out a lope and search for them.  It displays as damage free from any view, and every view is nice.   Mounted on a custom engraved acrylic base.  This is a top New England specimen at a fraction of what specimens of this caliber normally sell for on today's mineral market.   Mounted on a custom engraved acrylic base.  $2,400

 

 

 

 

 

 

OKAA-047

OKAA-047      Quartz and Calcite    Roncari Quarry, (Tilcon Quarry), East Granby, Hartford County, Connecticut.  This specimen is a baseball size and shaped piece that is the end of a stalactitic growth.  The coating of calcite crystals is on all sides except the base and the quartz points coat the majority on one side.  It measures 8.5 x 8 x 6.5 cm.  There are two tiny missing quartz points and a couple cleaved calcite... all of which you will have to search for to find.  Excellent quality!  Mounted on a custom engraved acrylic base.  $400

 

 

 

 

 

 

OKAA-048

OKAA-048      Quartz and Calcite    Roncari Quarry, (Tilcon Quarry), East Granby, Hartford County, Connecticut.  Another pocupine like specimen with high luster and aesthetics... The coating of calcite crystals is on all sides except the base and the quartz points coat all of the front display face of the specimen.  It measures 11.5 x 9.4 x 7 cm.  There are two tiny missing quartz points with only one being visible to the eye and not at all distracting.  There is some rubbing tot he calcite on the back.  Again, excellent quality.  Mounted on a custom engraved acrylic base.  $550

 

 

 

 

 

 

OKAA-049

OKAA-049    Calcite on Quartz Casts after Anhydrite    Roncari Quarry, (Tilcon Quarry), East Granby, Hartford County, Connecticut.  This type of specimen is what will eventually lead to the material from this quarry being a classic.  The quartz making the casts after anhydrite are larger and hematite coating, creating a wonderful contrast.  The calcites have selective face coatings, are often double terminated and lustrous.  There is lots to take in regarding this fine piece so I will let the images do most of the talking.  14.5 x 9.2 x 8.5 cm.  Material internal to the opening is damage free and the edge contacts are no bad either.  A fantastic example of what I would believe most collectors would consider the most interesting and aesthetic material to come from this important find.  Mounted on a custom engraved acrylic base.  $1,650

 

 

 

 

 

 

 

OKAA-050

OKAA-050    Calcite on Calcite coated Stalactites    Roncari Quarry, (Tilcon Quarry), East Granby, Hartford County, Connecticut.  A large (6 cm) double terminated calcite on the end of several parallel growth stalactites coated by smaller calcites.  Rich hematite staining adds nice contrast to the calcite so its complex nature can be better appreciated.  Backside has a tiny contact only a couple millimeters in size.  Front, sides, top all view as damage free.  6 x 5.2 x 2.5 cm.  Mounted on a custom engraved acrylic base.  You'd have a hard time finding a dealer who would make the base for this price!  $250

 

 

 

 

 

 

 

OKAA-051

OKAA-051    Calcite on Quartz Casts after Anhydrite    Roncari Quarry, (Tilcon Quarry), East Granby, Hartford County, Connecticut.  This type of specimen is what will eventually lead to the material from this quarry being a classic.  Numerous large casts which show openings so their interiors can be viewed.  A complex group measuring 7.5 x 6.2 x 4 cm.  Only a couple tiny (basically micro) points missing.  Excellent condition overall.  Mounted on a custom engraved acrylic base.  $425

 

 

 

 

 

 

 

OKAA-052

Base

OKAA-052    Calcite     Roncari Quarry, (Tilcon Quarry), East Granby, Hartford County, Connecticut.  Large gemmy double terminated calcites growing on stalactites.  Interesting and aesthetic!  7.4 x 6.2 x 5.3 cm.  Only one minor contact on one end otherwise in great condition.  Some faces are slightly frosted, some are glass clear and of a higher luster.  Internally there are fractures but much of the crystal's interiors are clear.  Uncommon for the find and for the quarry.  Mounted on a custom engraved acrylic base.  $550

 

 

 

 

 

 

OKL-756

OKL-756     Sphalerite, Quartz, Fluorite and Pyrite      State Rt #25 Road Cuts, Trumbull, Fairfield County, Connecticut. Ex. Thomas G Fowler Collection. 8.1 x 4 x 3.7 cm overall with lots of small crystals no larger than a cm intergown in this well crystallized piece. Almost a floater with minimal contact and no damage. Fluorites are obscured within the other waves of crystals. Uncommon in this good a quality. Minor Styrofoam attachments on one side. Nice. $165

 

 

 

 

 

 

OKL-757

OKL-757     Sphalerite, Quartz      State Rt #25 Road Cuts, Trumbull, Fairfield County, Connecticut. Ex. Thomas G Fowler Collection. A 4.5 x 4.2 x 2.7 cm floater with small crystals and plates of quartz. Attractive and damage free. Nicely mounted in a perky box. $90

 

 

 

 

 

 

OKG-165

OKG-165    Quartz Stalactite   Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   7 x 4.5 x 3.5 cm.  This fine stalactite is completely damage free and coated by Herkimer style quartz crystals on every surface other than its base, which it sits on perfectly for display.  There are tiny balls of red and silver colored hematite throughout.  The quartz is actually very clear and coating previous mineralization which can be seen through them in many places.  Great luster and displays fine from any side.  $250

 

 

 

 

OKG-457

OKG-457    Quartz cast after Anhydrite   Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   5.4 x 4.5 x 2 cm.  An attractive, large pair of crystal casts which stand upright protruding from others.  Good views all around and I can only find one tiny missing crystal on the top of the piece.  Exceptional.  $230

 

 

 

 

OKJ-978

OKJ-978    Quartz and Calcite Stalactite   Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   7.1 x 2.5 x 2.1 cm with quartz to 1 cm.  Another fantastic stalactite with a look of its own.  This one has lots of singe and double terminated quartz crystals and calcites on it surface well dispursed and lustrous.  No damage.  Also, like many of these specimens, better in hand.  $190

 

 

 

 

OKG-294

Bottom

OKG-294    Quartz, Calcite, Hematite   Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   5.1 x 4.4 x 3.1 cm.  Lots of blades of dark colored hematite stud the clear quartz that coats this domical specimen.  It is part of a bubble which is also coated with quartz and hematite on its inside.  Edge damage only from removal from matrix.  $80

 

 

 

 

OKG-189

OKG-189    Prehnite on Quartz and Calcite   Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   5.5 x 5.5 x 3 cm with quartz to 1.3 cm and calcite to 2 cm each.  A nicely balanced group of well formed crystals.  Backside chip on one quartz and one tiny prehnite ball is broken on base edge (easily seen in first image.  Selective face coatings by hematite on the calcites.  These minor issues have lead to a large price reduction to this fine miniature.   $140

 

 

 

 

OKG-371

OKG-371    Prehnite, Calcite, Stiphalomine, and Babingtonite   Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.  4.5 x 3.5 x 2.4 cm with prehnite balls  to 1.6 cm. The babingtonite crystal measures 1 cm long. Very complex mineralology and paragenesis here including anhydrite cast by all minerals, anyhdrite blade inclusions in the calcites and at least one unknown species as small blades.  Minor scuffing to a couple calcites but overall in nice condition.  $360

 

 

 

 

OKG-456

Hollow inside.

OKG-456    Quartz Stalactite   Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   4.1 x 3.1 x 2. cm.  A completely damage free, hollow stalactite.  Needs some basic toothbrush and water cleaning.  Very nice.   $120

 

 

 

 

OKG-387

OKG-387    Calcite on Quartz casts after Anhydrite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   47 x 3.2 x 2.6 cm with the large calcite measuring over 4 cm each. A super miniature at a fine price... cut in half due to a tiny rub on the calcite termination (even difficult to see in the blown up images.  The quartz are casts after anhydrite too!  A thing of beauty.   $100

 

 

 

 

OKG-124

OKG-124    Calcite    Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   5.2 x 4 x 3 cm.  This is probably one of the finest calcites from the find!!  Gemmy throughout much of its body, included by hematite blades with many also on the surface.  It is very complex with numerous forms I am unfamiliar with.  No damage what so ever and a floater.  he luster is much better than the images indicate and as a whole the pictures can't do it justace.  It basically looks like an Indian calcite but way better!  And with all of that, it's also twinned!!  An expensive calcite...not really. $395

 

 

 

 

OKG-436

OKG-436    Quartz Stalactite   Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   4.3 x 1.5 x 1.3 cm.  Cumberland habit quartz crystals make up the entire stalactite.  Zero damage.  A stunning miniature for this price.   $90

 

 

 

 

OKG-129

OKG-129    Calcite on Quartz     Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   6.5 x 4.6 x 3 cm.  The calcites are up to 2 cm each.  Fine, clear to translucent in some areas.  Great luster.  English like material here with several crystals being twinned.  Minor hematite inclusions.  Damage free.  $140

 

 

 

OKG-065

Back side

Bottom

OKG-065     Calcite and Quartz  Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   5.3 x 4 x 3.5 cm.  The calcites are to over 3 cm each.  An aesthetic miniature that views better than my photography shows.  No damage only a healed contact (all natural) on edge of the calcite.  The quartz is clearer than it appears here too.  Very fine example.   $180

 

 

 

 

 

 

 

OKK-123

OKK-123     Kyanite     Judd's Bridge, Roxbury, Connecticut.  Ex Dr. Steve Chamberlain collection.  7.8 x 6 x 4.5 cm rock with nice blades of kyanite throughout.  One small area is sawn flat so it sands on end.  $35

 

 

 

 

 

OKG-023

OKG-023     Calcite, and Prehnite with Hematite coatings    Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   6.5 x 6 x 4.5 cm.  A very large calcite crystal with heavy and selective region hematite coatings.  For some reason the tip of this one is not heavily coated.  Minor prehnite balls around the base (visible in first and last images) of the piece but this is not a visible as one would like due to the coatings.  Damage free.  $175

 

 

 

 

OKJ-979

Back

Edge view

Edge view

OKJ-979    Quartz casts after Anhydrite    Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   5.3 x 3.6 x 2.3 cm.  Nice, large parallel growth casts with only two very tiny crystals missing.  Desirable specimen for this find.  $300

 

 

 

OKG-420

Back

OKG-420    Calcite Twin on Quartz Stalactite   Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.  4.6 x 4.2 x 2.7 cm.  Calcites to 4.2 cm.   Exceedingly complex, twinned crystals with excellent clarity in most regions on a partial stalactite.  One cleave on one crystal but it still is very much worth listing and owning.  $160

 

 

 

 

 

OKG-013

Back

OKG-013    Prehnite on Quartz and Calcite with Hematite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   7.4 x 6 x 4 cm.  A fine floater with a nice mix of minerals. The usual selective face coatings on the calcites, clear quartz and green balls of prenhite throughout.  All sides are nicely crystallized and attractive with the back and one edge being darker from hematite (which is sometimes in small blades).  A few small rubs/ chips but none are distracting so this would still qualify as being in nice condition.  $375

 

 

 

 

OKG-417

OKG-417    Babingtonite, Prehnite, Calcite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   5 x 4.5 x 3.1 cm. An unusual specimen with white translucent calcites and light green prehnites.  The babingtonite crystals are small and certainly a rare mineral for this quarry and this specific find.  Displays nicest on edge as seen in the second image and is damage free.  $250

 

 

 

 

 

OKG-442

OKG-205     Calcite on Quartz coated Casts of ?         Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. 10.5 x 8 x 3.4 cm with calcites to 1.8 cm.   A large plate of tiny quartz and larger double terminated calcites coating one side of this fine specimen.  The matrix is layered quartz on bubbles of ????  There were five or six of these specimen produced in total from this new find and this was the third best that I am aware of.  The piece is more three dimensional than the images show.  Very unusual and interesting piece.  $250

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