Mineral Specimens with Calcite

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 page 18 / 208  -  prev  -  3120 specimens selected  -  next


HECK-089 - Rhodochrosite pseudo. after Calcite - $ 450 SOLD
Taxco, Guerrero, Mexico

thumbnail, 2.1 x 1.8 x 1.5 cm
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Rhodochrosite pseudo. after Calcite from Taxco, Guerrero, Mexico [db_pics/heck/HECK089a.jpg]
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Rhodochrosite pseudo. after Calcite from Taxco, Guerrero, Mexico [db_pics/heck/HECK089b.jpg]
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Rhodochrosite pseudo. after Calcite from Taxco, Guerrero, Mexico [db_pics/heck/HECK089c.jpg]
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Rhodochrosite pseudo. after Calcite from Taxco, Guerrero, Mexico [db_pics/heck/HECK089d.jpg]

This is an exquisitely formed, razor-sharp scalenohedron of rhodochrosite pseudomorph after the calcite (which it has replaced). The spearpoint crystal is 2.1 cm in length and the color is a lustrous and translucent, vivid, pink color. An added accent is the small , sparkling cluster gemmy quartz crystals on the lower left. A thumbnail, with big visual impact!


HECK-094 - Calcite on Quartz - $ 175 SOLD
Guanajuato, Guanajuato, Mexico

miniature, 2.8 x 2.1 x 1.6 cm
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ex.  Richard Heck

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Calcite on Quartz from Guanajuato,  Guanajuato, Mexico [db_pics/heck/HECK094b.jpg]
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Calcite on Quartz from Guanajuato,  Guanajuato, Mexico [db_pics/heck/HECK094a.jpg]
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Calcite on Quartz from Guanajuato,  Guanajuato, Mexico [db_pics/heck/HECK094c.jpg]
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Calcite on Quartz from Guanajuato,  Guanajuato, Mexico [db_pics/heck/HECK094d.jpg]

Bladed, glassy and gemmy, colorless crystals, to 1.3 cm across, are aesthetically perched high on a matrix of drusy, pastel purple amethystine quartz . Quite lovely and elegant, this is like a little jewel!!! It is one of my favorite calcite thumbnails, period.


HECK-099 - Calcite on Galena - $ 1000
Naica, Chihuahua, Mexico

cabinet, 12.9 x 10.3 x 7.1 cm
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ex.  Richard Heck

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Calcite on Galena from Naica, Chihuahua, Mexico [db_pics/heck/HECK099a.jpg]
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Calcite on Galena from Naica, Chihuahua, Mexico [db_pics/heck/HECK099c.jpg]
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Calcite on Galena from Naica, Chihuahua, Mexico [db_pics/heck/HECK099d.jpg]
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Calcite on Galena from Naica, Chihuahua, Mexico [db_pics/heck/HECK099e.jpg]

Dramatic large specimen! A matrix of splendent, battleship-gray, galena crystals to 4.2 cm across is the pedestal for an unusual, pineapple-shaped compound crystal of lustrous, translucent, white calcite. The terminations of the large rhombohedral calcite, which are complete around the top, have "exploded" into many small, sharp "dog-tooth" scalenohedrons. The calcite rests on a fluorite crystal, mostly buried beneath and inside of the overlaying calcite but visible through the (broken off, and thus exposed) backside of the piece.


HECK-100 - Quartz ps. after Calcite Stalactites - $ 1500
Charcas, San Luis Potosi, Mexico

large cabinet, 15.4 x 11.5 x 11.4 cm
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ex.  Richard Heck

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Quartz ps. after Calcite Stalactites from Charcas, San Luis Potosi, Mexico [db_pics/heck/HECK100a.jpg]
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Quartz ps. after Calcite Stalactites from Charcas, San Luis Potosi, Mexico [db_pics/heck/HECK100b.jpg]
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Quartz ps. after Calcite Stalactites from Charcas, San Luis Potosi, Mexico [db_pics/heck/HECK100c.jpg]
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Quartz ps. after Calcite Stalactites from Charcas, San Luis Potosi, Mexico [db_pics/heck/HECK100d.jpg]
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Quartz ps. after Calcite Stalactites from Charcas, San Luis Potosi, Mexico [db_pics/heck/HECK100e.jpg]

This bizzare, sculptural piece just leaps out to the eye. It is sparkly and actuallly has a pretty orange-brown color to it, but the overall shape is what appeals most. Stalactites of calcite to 12 cm in length have been totally replaced, it seems, by sparkling, colorless, drusy quartz. The stalactitic fingers formed in roughly parallel growth. The piece is complete on the display face, though some terminations of stalactites to the sides and rear are broken off (certainly understandable in context). The parallel growth along with the quartz encrustation has given the specimen a rather unusual shape, as if it was blowing in the wind.


HECK-102 - Adamite (Cuprian) & Calcite - $ 1800 SOLD
Ojuela Mine, Mapimi, Durango, Mexico

cabinet, 13.9 x 13.7 x 8.4 cm
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ex.  Richard Heck

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Adamite (Cuprian) & Calcite from Ojuela Mine, Mapimi, Durango, Mexico [db_pics/heck/HECK102a.jpg]
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Adamite (Cuprian) & Calcite from Ojuela Mine, Mapimi, Durango, Mexico [db_pics/heck/HECK102b.jpg]
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Adamite (Cuprian) & Calcite from Ojuela Mine, Mapimi, Durango, Mexico [db_pics/heck/HECK102c.jpg]
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Adamite (Cuprian) & Calcite from Ojuela Mine, Mapimi, Durango, Mexico [db_pics/heck/HECK102d.jpg]

A vuggy, ocherous, limonite matrix is the host for this crust of very lustrous, aqua-green colored cuproadamite, which has bubbled into sphere-like masses where there is available room in the pockets. The piece overall is big and impressive, and shows well how these things form in crevasses in previously cracked rock matrix. The largest of the stalactite-like formations is 3.5 cm in length. The contrast in color between the intense green adamite and the ocherous brown matrix adds to the look of this as an "art object" and it really shows off in a display case.


HECK-108 - Quartz encrusting Danburite with Calcite - $ 750
Charcas, San Luis Potosi, Mexico

small cabinet, 9.2 x 8.8 x 8.5 cm
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ex.  Richard Heck

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Quartz encrusting Danburite with Calcite from Charcas, San Luis Potosi, Mexico [db_pics/heck/HECK108d.jpg]
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Quartz encrusting Danburite with Calcite from Charcas, San Luis Potosi, Mexico [db_pics/heck/HECK108e.jpg]
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Quartz encrusting Danburite with Calcite from Charcas, San Luis Potosi, Mexico [db_pics/heck/HECK108b.jpg]

Two, very large crystals in parallel growth of danburite, to 10 cm in length, have been thickly encrusted by sparkling drusy quartz. The front side, which is a white quartz druse, is different from the back side which has a sparkling, colorless druse of calcite. Overall a very geometric and unusual specimen.


HECK-109 - Calcite (Fishtail Twin) - $ 1250
Taxco, Guerrero, Mexico

small cabinet, 8.0 x 8.5 x 8.4 cm
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ex.  Richard Heck

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Calcite (Fishtail Twin) from Taxco, Guerrero, Mexico [db_pics/heck/HECK109a.jpg]
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Calcite (Fishtail Twin) from Taxco, Guerrero, Mexico [db_pics/heck/HECK109b.jpg]
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Calcite (Fishtail Twin) from Taxco, Guerrero, Mexico [db_pics/heck/HECK109c.jpg]
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Calcite (Fishtail Twin) from Taxco, Guerrero, Mexico [db_pics/heck/HECK109d.jpg]

Amazingly, perfectly centered above a wreath of smaller calcite crystals, stands this majestic, fishtail twin of lustrous and translucent, white calcite, 6.25 cm in height. I have not seen such a twinned calcite from Mexico before, beyon da thumbnail that I can recall. This is a very rare habit for calcite generally, and tends to come from Midwest locales, and a few other places - but not from here. The piece is sparkly overall, and just could not be composed better


HECK-112 - Calcite on Galena - $ 250
Naica, Chihuahua, Mexico

small cabinet, 5.6 x 4.9 x 4.6 cm
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ex.  Richard Heck

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Calcite on Galena from Naica, Chihuahua, Mexico [db_pics/heck/HECK112a.jpg]
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Calcite on Galena from Naica, Chihuahua, Mexico [db_pics/heck/HECK112b.jpg]
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Calcite on Galena from Naica, Chihuahua, Mexico [db_pics/heck/HECK112c.jpg]

Diverging scalenohedrons of lustrous and translucent, milky colored calcite, to 1.5 cm in length, are emplaced on crystals of splendent, battleship gray, galena, to 2.5 cm across. Overall a cute specimen with great 3-dimensionality and fairly unique aesthetics. Pristine, as with nearly all Heck pieces


HECK-113 - Calcite included by Hematite (Twinned) - $ 300
Santa Eulalia, Chihuahua, Mexico

miniature, 4.9 x 4.1 x 3.5 cm
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ex.  Richard Heck

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Calcite included by Hematite (Twinned) from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK113a.jpg]
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Calcite included by Hematite (Twinned) from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK113b.jpg]
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Calcite included by Hematite (Twinned) from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK113c.jpg]
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Calcite included by Hematite (Twinned) from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK113d.jpg]

Aesthetically perched on an ocherous matrix are hematite-included crystals of equant, twinned calcite, to 3 cm across. The crystals are lustrous, partially translucent, and exhibit a rich brownish red coloration. Very pretty! This particular material tends to form flat plates, and a piece like this is hard to obtain for its aesthetics. from old finds here in the 1970s


HECK-114 - Mimetite on Calcite - $ 450
Santa Eulalia, Chihuahua, Mexico

miniature, 4.5 x 3.8 x 3.0 cm
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ex.  Richard Heck

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Mimetite on Calcite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK114a.jpg]
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Mimetite on Calcite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK114b.jpg]
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Mimetite on Calcite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK114c.jpg]
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Mimetite on Calcite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK114d.jpg]

This piece has more 3-dimensionality and "airiness" to it than usually seen in the material, which tends towards massive agglomerations of mimetite rather than to aesthetics. Contrasting in form and color with its accent, the lustrous and translucent, sharp white calcite rhomb of 1.8-cm-across, is a cluster of lustrous, translucent, amber-colored mimetite crystals, to 8 mm in length. Not to be confused with later finds at San Pedro Correlitos, this is an old classic


HECK-118 - Calcite included by Hematite - $ 2000 SOLD
Santa Eulalia, Chihuahua, Mexico

cabinet, 13.3 x 8.1 x 2.9 cm
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ex.  Richard Heck

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Calcite included by Hematite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK118a.jpg]
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Calcite included by Hematite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK118b.jpg]
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Calcite included by Hematite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK118c.jpg]
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Calcite included by Hematite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK118d.jpg]
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Calcite included by Hematite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK118e.jpg]

A matrix of reddish-brown, massive hematite hosts a sparkling druse of brilliant little red calcites, all colored a solid red with hematite inclusions. Atop the sparkly layer, are several very sharp, very glassy, and slightly translucent calcite rhombohedrons to about an inch across. The crystals are heavily included by finely disseminated reddish hematite dust, which gives them their color. This is from classic old finds here. Some has also been found more recently, but not with such intense color as the best of the old material. And of this older material, VERY few pieces have such luster as this does...equally as important as the color. Also, the plate has no damage and is pristine (yet again, uncommon for the material)


HECK-119 - Calcite included by Aurichalcite - $ 900
Ojuela Mine, Mapimi, Durango, Mexico

small cabinet, 8.5 x 5.3 x 3.9 cm
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ex.  Richard Heck

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Calcite included by Aurichalcite from Ojuela Mine, Mapimi, Durango, Mexico [db_pics/heck/HECK119a.jpg]
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Calcite included by Aurichalcite from Ojuela Mine, Mapimi, Durango, Mexico [db_pics/heck/HECK119b.jpg]
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Calcite included by Aurichalcite from Ojuela Mine, Mapimi, Durango, Mexico [db_pics/heck/HECK119c.jpg]

Aesthetically nestled in a vug of ocherous limonite are rhombohedrons and scalenohedrons of lustrous and translucent calcite (to 1.8 cm in length) that have been totally included by aurichalcite, giving the crystals a spectacular sky blue color. The contrast to the dark matrix is very appealing, and the association was always rare and highly unusual (for this or any other locale). Beautiful!


HECK-120 - Fluorite & Calcite - $ 500 SOLD
Taxco, Guerrero, Mexico

small cabinet, 9.8 x 7.3 x 3.8 cm
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ex.  Richard Heck

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Fluorite & Calcite from Taxco, Guerrero, Mexico [db_pics/heck/HECK120a.jpg]
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Fluorite & Calcite from Taxco, Guerrero, Mexico [db_pics/heck/HECK120b.jpg]
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Fluorite & Calcite from Taxco, Guerrero, Mexico [db_pics/heck/HECK120c.jpg]

A sulfide matrix is host to elongated scalenohedrons of lustrous, ivory-colored calcite, to 5. 5 cm across, which are surrounded by lustrous and translucent fluorite crystals that exhibit stepped growth. The fluorite crystals are very sharp, reach 2 cm across and have a frosted surface to them. Overall an interesting combination piece. Note that his is from Taxco, not Naica - such fluorites, and combinations, are much more rare here


HECK-133 - Fluorite with Pyrite & Calcite - $ 250 SOLD
Santa Eulalia, Chihuahua, Mexico

small cabinet, 6.8 x 6.3 x 3.4 cm
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ex.  Richard Heck

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Fluorite with Pyrite & Calcite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK133a.jpg]
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Fluorite with Pyrite & Calcite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK133b.jpg]
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Fluorite with Pyrite & Calcite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK133c.jpg]

A glassy and gemmy, light-green crystal of fluorite, measuring 2.5 cm across, is nearly surrounded by rosettes of lustrous and translucent, white calcite to 8 mm in length. A drusy coating of brassy yellow pyrite also provides a halo for the fluorite crystal and creates an unusual combination piece


HECK-139 - Quartz with Mangano-Calcite on Calcite - $ 500
Santa Eulalia, Chihuahua, Mexico

small cabinet, 6.4 x 3.8 x 3.2 cm
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ex.  Richard Heck

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Quartz with Mangano-Calcite on Calcite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK139b.jpg]
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Quartz with Mangano-Calcite on Calcite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK139c.jpg]
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Quartz with Mangano-Calcite on Calcite from Santa Eulalia, Chihuahua, Mexico [db_pics/heck/HECK139d.jpg]

A wonderful combo specimen! This features a 6.4 cm-long glassy and gemmy, colorless quartz crystal covered on three sides by 7 mm-long lustrous and translucent, colorless, calcite crystals which have been coated by drusy mn-calcite with an eye pleasing light pink color. Under the fluorescent light, the calcites glows a rich orange color.



(click on a page number to go to that page:)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72
73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108
109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126
127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144
145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162
163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180
181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198
199 200 201 202 203 204 205 206 207 208

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Rob Lavinsky, rob@irocks.com

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