Connecticut Mineral Specimens For Sale, Page 4

   

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.

 

 

 

 

 

OKG-441

OKG-441    Prehnite and Calcite on Stipnomeline      Roncari Quarry Tilcon Quarry), East Granby, Hartford, Connecticut. This small specimen is so aesthetic when inspected closely that it is difficult to describe fully here. Selective coatings of fibrous stipnomeline with overgrows of very complex calcites (double terminated and sometimes cavernous) and double terminated barrel shaped, translucent to transparent prehnite crystals. A couple very tiny bruises don’t distract from the aesthetics and complexity of this unique specimen. 3.8 x 3.5 x 2.2 cm. Impressive piece. $395

 

 

 

 

 

OKL-219

OKL-219   Stilbite on Calcite      O&G Quarry, Woodbury, Connecticut. Ex. Thomas G Fowler Collection. 6.5 x 4.2 x 4.2 cm grouping of large, clean calcites with coatings of druse stilbites. Nice condition without damage. Mounted in perky box. $60

 

 

 

 

 

 

 

OKI-529

OKI- 529       Calcite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  2.8 x 2.7 x 2.5 cm calcite of complex form on minor matrix. The crystal is of high luster and good form with only minor edge contacts and no damage.  20$

 

 

 

 

 

 

OKI-530

OKI- 530       Calcite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  Very unusual form to this crystal which could be the result of its once being against another crystal that is now completely gone.  Odd for sure.  The calcite is attached to a piece of stalactite.  2.5 x 2.5 x 1.9 cm piece with the primary crystal measuring 1.9 cm.  25$

 

 

 

 

 

OKI-532

OKI- 532       Calcite on Quartz Stalactite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  3.5 cm stalactite with coatings of small calcites and larger quartz crystals.  The calcites are lower in luster making the piece look duller, overall.  No damage and cool form.  Fine views which look the same from any side.  45$

 

 

 

 

 

OKI-533

OKI- 533       Calcite on Quartz Stalactite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  Aesthetic piece with calcites to 2 cm each on quartz stalactites.  One tiny tip ding on a small calcite but otherwise the perfect specimen for all that matters.  2.5 cm long.  Luster, form crystallography, minor pyrite associations…everything adds up to a desirable TN specimen.  50$

 

 

 

 

 

OKI-534

OKI- 534       Calcite Stalactite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  A spiky thing indeed.  4.2 cm long and fits in a perky box when tilted.  Low luster but fine form and no damage.  Great views all around.  25$

 

 

 

 

 

OKI-535

OKI-535        Calcite, Prehnite and Quartz     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  The calcites are white and very translucent, showing prehnite balls on their surfaces and as inclusions.  The quartz crystals, however, dominate this piece.  The clear quartz points show the hematite coloration and are single and double terminated…to 2 cm each..  Very clean floater with an edge showing contact. Backside is a cast after a botryoidal mineral which is now gone.  Displays great.  3.2 x 2.5 x 1.5 cm overall and does fit in a TN case.  Excellent example.  30$

 

 

 

 

 

OKI-536

OKI-536        Calcite, Prehnite and Quartz     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  The calcites are white and very translucent, showing prehnite balls on their surfaces and as inclusions.  The quartz crystals, however, dominate this piece.  The clear quartz points show the hematite coloration and are single and double terminated…to 1.8 cm each..  Very clean plate with an edge showing contact. Backside is a cast after a botryoidal mineral which is now gone.  Displays great.  2.6 x 2.5 x 2 cm.  Excellent example.  25$

 

 

 

 

 

 

RON-001

Backside showing open cast

RON-001    Quartz Cast after Anhydrite with Hematite and Chlorite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  This specimen is a partial quartz cast encrustation pseudomorph.  This material is atypical of the usual mineral assemblages found at the Roncari and vastly superior to material which has been recovered prior to 2002.  The entire front and edges of the tabular anhydrite crystal were coated by alpine quality quartz crystals and minor red hematite and green chlorite while the backside remained open.  The back allows a great view of the original anhydrite form.  Very high luster, no damage and superb form.  Large casts like this one, measuring 5.6 x 3.5 x 1.2 cm are not at all common.  It is also unusual to see these without damage because they were recovered from a collapsed pocket in a quarry which actively blasts.  I believe these specimens will soon be considered a modern day east coast classic.  Aesthetic and reasonably priced at… 125$

 

 

 

 

 

RON-002

RON-002    Quartz and Calcite with minor Goethite and Hematite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  This fine specimen is composed of a large calcite on beautifully formed alpine quality quartz.  This material is atypical of the usual mineral assemblages found at the Roncari and vastly superior to material which has been recovered prior to 2002.  Red hematite staining adds contrast and better shows the complexity of these fine calcites.  The calcite exhibits nice luster and is very translucent.  A few brownish black goethite pseudos after hematite which are only a few millimeters each.  This specimen measures 6.1 x 4 x 3 cm overall with the primary calcite crystal measuring 3.8 cm.  Very nice 125$

 

 

 

 

 

RON-003

RON-003     Quartz on Calcite with Goethite and Hematite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  A fine matrix specimen consisting of bet form quartz crystals with minor red hematite staining on a druze of white calcite.  The quartz is exceptional with fine crystals to 1.4 cm in diameter each.  They are clear in much of their bodies and get milky with depth.  There are balls and rosettes of hematite which look to be altered (pseudomorphed) to a reddish brown goethite.  This variety of quartz is uncommon and the example sown here is exceptionally fine for the quarry.  No damage make this piece even more unusual.  200$

 

 

 

 

 

 

RON-004

RON-004     Quartz with minor Hematite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  Aesthetic, alpine quality quartz with minor hematite staining on matrix.  The specimen measures 6 x 4.7 x 3.4 cm overall with crystals to 2 cm each.  No damage.  The hematite adds just enough contrast to better view the exceptional form of these quartz crystals.  Fine example.  65$

 

 

 

 

 

 

RON-005

Back

RON-005     Quartz (Amethyst) with Hematite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  Amethyst is very rare here and even though it is light in color, it is amethyst.  This damage free specimen is a plate of crystals which are forming a cast after some previous mineral in botyoidal form.  High luster and measures 6 x 5.5 x 2 cm.  90$

 

 

 

 

 

 

RON-006

Back

Calcite close up (back)

Quartz close up (front)

RON-006     Quartz and Calcite with minor Hematite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  From the front this plate of crystals is almost all quartz and from the back it is mostly calcite.  The specimen is a floater save one edge contact and it measures 6 x 5 x 2.2 cm.  The quartz reach 2.3 cm each and the calcites .4 cm.  Tiny red hematite balls scattered about on the quartz add some character.  Zero damage.  60$

 

 

 

 

 

RON-008

RON-008    Phantom Calcite on Quartz, hematite and Stilpnomelane    Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  An unusual piece in that the yellow matrix balls and coatings and phantoms within the calcites are the mineral stilpnomelane.  8.7 x 6 x 3.8 overall.  Sits nicely for display and exhibits no damage.  A nice example of this uncommon mineral.  80$

 

 

 

 

 

RON-009

A better look at the phantoms

RON-009     Quartz and Calcite with minor Hematite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  This fine specimen is composed of a large calcite on beautifully formed alpine quality quartz.  This material is atypical of the usual mineral assemblages found at the Roncari and vastly superior to material which has been recovered prior to 2002.  Red hematite staining adds contrast and better shows the complexity of this fine calcite.  The calcite exhibits high luster and is very translucent (transparent in regions).  This specimen measures 6.1 x 4 x 3.2 cm overall.  Hematite is isolate to select areas on only some of the faces.  Very attractive and better in hand.   135$

 

 

 

 

 

 

RON-010

RON-010      Hematite coated Quartz on Stipnomeline    Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  Five single and double terminated quartz points are clustered together on a bed of gold colored stipnomeline in this fine miniature.  The piece measures 4.5 x 3.4 x 2.1 cm and is quite attractive given the red color of the crystals and light color of the background.  Aesthetic and damage free.  60$

 

 

 

 

 

 

RON-011

RON-011     Quartz and Calcite with minor Hematite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford County, Connecticut.  Nice gemmy clear calcites to 2 cm each form a dense coating on this matrix.  The calcites show selective face coatings by red and gray hematite creating an attractive visual effect for this small cabinet sized specimen.  It measures 6.1 x 5.5 x 2.7 cm and has no damage.  A fine piece.  110$

 

 

 

OKI-662

OKI-662    Quartz on Calcite      Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.  These two crystals, to 3.7 cm each form a “V” on a matrix coated by small white to clear calcites.  The pieces measures 6 x 4.8 x 3 cm overall.  The quartz are unusual for the locality, having an unusual growth feature on all the prism faces.  It is almost like a stepped overgrowth of a second generation of quartz in epixaty.  The overgrowth is milky and the terminations are clear.  There is a tiny “Wilbur” on one termination.  A very displayable piece which is the only one like it of which I am aware.  275$

 

 

 

 

 

 

OKI-660

OKI-660    Quartz on Calcite    Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.  Beautiful gemmy quartz to 2.8 cm each sit up high off the surface of this domical plate of calcites.  The crystals are well formed and both single and double terminated.  There is a moderate amount of hematite in small red balls as inclusions and as coatings on the quartz and calcite.  Damage free, which is quite unusual for this material.  This is a big plate measuring 11.5 x 11 x 5.5 cm.  It sits on edge nicely for display.  Flashy!  225$

 

 

 

 

 

 

OKG-021

OKG-021     Prehnite on Calcite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   5.1 x 3.5 x 3.5 cm.  These selective face coated and included calcites are really special and unusual.  Satin to glassy luster, depending on the face.  Stepped growth and I would also describe it as being a scepter.  Prehnite balls climbing up all sides with some having hematite coatings.  Small cleave on backside so it views best from sides and front.  Really nice.   $175

 

 

 

 

OKG-018

OKG-018     Prehnite on Calcite       Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   8.3 x 5 x 4 cm.  These selective face coated and included calcites are really special and unusual.  Satin to glassy luster, depending on the face.  Stepped growth and I would also describe it as being a scepter.  Prehnite balls climbing up all sides with some having hematite coatings, also as blades.  This one is exceptional for size and quality having only one tiny Wilbur.  Spectacular example from this important find.   $450

 

 

 

 

OKG-307

OKG-307     Calcite and Quartz     Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   7.4 x 4.5 x 1.7 cm.  Hollow calcite schalenohedrons with fillings of quartz and hematite.  Very interesting material of which there were few recovered from the find.  Damage free and priced to go.  $45

 

 

 

 

OKG-267

OKG-267     Calcite Twin on Quartz    Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   8.6 x 6 x 3.1 cm.   The large twinned calcite measures 3.2 x 2 x 1.8 cm.  Light yellow color and good clarity.  very tiny nick on one edge that is tough to see, even in these blown up images.  Displays great.    $225

 

 

 

 

 

OKG-323

Back

OKG-323     Prehnite casts after Anhydrite      Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   4.6 x 4.2 x 2.3 cm.  An unusual, basically one of a kind for appearance for the find.  Great casts with only the most minor of edge contacts in a couple of spots.  Very dark material for this find.  $190

 

 

 

 

OKG-532

Bottom

OKG-021     Prehnite and Calcite casts after Anhydrite with Quartz     Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   5.2 x 4.8 x 3 cm.  Calcite crystals to over 3 cm.  An attractive cluster of complex calcites and light green prehnites.  Back and some edge contacts.  Tiny area of broken prehnite on front where there is a cast running through one of the calcites (near bottom right of first image).  $195

 

 

 

 

OKG-317

OKG-317     Datolite with Apophyllite       Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   8.7 x 5.5 x 5.5 cm.  Uncommon material for the find but not for the quarry.  These are gemmy crystals with a light green cast in parallel growth.  They are heavily coated by milky white apophyllite blades a few of which are broken as can be seen in the images, otherwise in excellent shape.  No damage to the fine datolite crystals.  Their surfaces vary in luster with some faces being bright and glassy and others having a matt finish.  $185

 

 

 

 

 

OKG-089

OKG-089    Calcite and Quartz    Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   8.2 x 6.5 x 4.2 cm with calcites to 1.5 cm.  This is a fine example of one of the rare calcite varieties.  Almost all crystals show selective face phantoms of interesting form and nice orange red color.  The same faces are slightly sunken (or hoppered/ skeletal).  Minor sulfides.  The only damage is on edges and one large crystal on edge is noticeably broken, but this should all be expected in specimens broken free from their homes in the rock.  All crystals making up the body of the specimen are well formed and glassy in luster.  Very fine example.  $195

 

 

 

 

OKJ-977

OKJ-977    Calcite    Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   8.2 x 6.5 x 4.2 cm with calcites to 1.5 cm.  $.1 x 3.3 x 2.8 cm.   A stepped growth single crystal with amazing phantoms on select faces.  The phantoms are a mix of browns and silvers and are hematite.  These phantoms, and the crystal itself, are far more attractive and interesting in-hand.  Nice luster and no damage to the crystal.  A very attractive specimen.  $95

 

 

 

 

OKG-326

OKG-326    Calcite     Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut.   6.4 x 3.6 x 2.8 cm with calcites to 4 cm.  Beautifully formed single and double terminated crystals that show fine luster and good translucence, more like transparency in areas.  No damage.  Minor hematite coatings help to give definition to the larger calcites.  $150

 

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