Selected Specimens

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85 86 87 88 89 90 91 92 93 94 95 96
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C266 - Galena $ 150 (=~ £ 108)
Krushev Dol Mine, Madan, Bulgaria
small cabinet - 6 x 6 x 3 cm


(click on an image to enlarge)

Galena from Krushev Dol Mine, Madan, Bulgaria [db_pics/pics/c266a.jpg] Galena from Krushev Dol Mine, Madan, Bulgaria [db_pics/pics/c266b.jpg]

Mirror lustrous Galena crystals that contrast well against the white matrix. Highly aesthetic and undamaged.


C267 - Amazonite $ 500 (=~ £ 360)
Minas Gerais, Brazil
cabinet - 13 x 10 x 7 cm


(click on an image to enlarge)

Amazonite from Minas Gerais, Brazil [db_pics/pics/c267a.jpg] Amazonite from Minas Gerais, Brazil [db_pics/pics/c267b.jpg] Amazonite from Minas Gerais, Brazil [db_pics/pics/c267c.jpg]

Large single Amazonite crystal with good color and remarkably good luster. Out of an old collection.


C269 - color change Dravite $ 200 (=~ £ 144) DISCOUNTED 50% OFF TO $ 100 (=~ £ 72)
Nchongo, Umba Valley, Tanzania
thumbnail - 1.3 x 1.1 x 1 cm


(click on an image to enlarge)

color change Dravite from Nchongo, Umba Valley, Tanzania [db_pics/pics/c269a.jpg] color change Dravite from Nchongo, Umba Valley, Tanzania [db_pics/pics/c269b.jpg]

Single Dravite crystal exhibiting the 'Usambara effect' color change (named after nearby mountains). This is a different type of color change than the Alexandrite effect, where the color changes in different types of lighting. In this case, the Dravite crystal appears green in normal lighting, however when a single light source is transmitted through the crystal, at a certain thickness, a sudden color shift from green to red is observed, while less thick areas remain green. Well terminated, complete crystal. This is often demonstrated by taking thin slices of crystals. If, for instance, the critical thickness is 3mm, you can take two slices that are 2mm thick each, and each will appear to be green. If you overlap them slightly, creating a combined thick ness of 4mm the area that is overlapped will appear red. This crystal is dark but very transparent, gem quality.Transparent red with strong backlighting.


C271 - color change Dravite $ 250 (=~ £ 180)
Nchongo, Umba Valley, Tanzania
thumbnail - 1.6 x 1.4 x 1.2 cm


(click on an image to enlarge)

color change Dravite from Nchongo, Umba Valley, Tanzania [db_pics/pics/c271a.jpg] color change Dravite from Nchongo, Umba Valley, Tanzania [db_pics/pics/c271b.jpg]

Single Dravite crystal exhibiting the 'Usambara effect' color change (named after nearby mountains). This is a different type of color change than the Alexandrite effect, where the color changes in different types of lighting. In this case, the Dravite crystal appears green in normal lighting, however when a single light source is transmitted through the crystal, at a certain thickness, a sudden color shift from green to red is observed, while less thick areas remain green. Well terminated, complete crystal. This is often demonstrated by taking thin slices of crystals. If, for instance, the critical thickness is 3mm, you can take two slices that are 2mm thick each, and each will appear to be green. If you overlap them slightly, creating a combined thick ness of 4mm the area that is overlapped will appear red. This crystal is dark but very transparent, gem quality. One chip on the termination.Transparent red with strong backlighting.


C272 - color change Dravite $ 150 (=~ £ 108) DISCOUNTED 50% OFF TO $ 75 (=~ £ 54)
Nchongo, Umba Valley, Tanzania
thumbnail - 1 x 0.9 x 0.8 cm


(click on an image to enlarge)

color change Dravite from Nchongo, Umba Valley, Tanzania [db_pics/pics/c272a.jpg] color change Dravite from Nchongo, Umba Valley, Tanzania [db_pics/pics/c272b.jpg]

Single Dravite crystal exhibiting the 'Usambara effect' color change (named after nearby mountains). This is a different type of color change than the Alexandrite effect, where the color changes in different types of lighting. In this case, the Dravite crystal appears green in normal lighting, however when a single light source is transmitted through the crystal, at a certain thickness, a sudden color shift from green to red is observed, while less thick areas remain green. Well terminated, complete crystal. This is often demonstrated by taking thin slices of crystals. If, for instance, the critical thickness is 3mm, you can take two slices that are 2mm thick each, and each will appear to be green. If you overlap them slightly, creating a combined thick ness of 4mm the area that is overlapped will appear red. This crystal is dark but very transparent, gem quality.Transparent red with strong backlighting.


C274 - Axinite $ 350 (=~ £ 252)
Pinos Altos, Baja Sur, Mexico
small cabinet - 6 x 5 x 5 cm


(click on an image to enlarge)

Axinite from Pinos Altos, Baja Sur, Mexico [db_pics/pics/c274a.jpg] Axinite from Pinos Altos, Baja Sur, Mexico [db_pics/pics/c274b.jpg] Axinite from Pinos Altos, Baja Sur, Mexico [db_pics/pics/c274c.jpg] Axinite from Pinos Altos, Baja Sur, Mexico [db_pics/pics/c274d.jpg]

Purple Axinite crystals intergrown with transparent Calcite crystals from an obscure Baja locality. Fine quality mound of crystals that is very hard to find and a must for a Baja or Mexican collection.


C276 - Boleite $ 500 (=~ £ 360)
Amelia Mine, Santa Rosalia, Baja Sur, Mexico
miniature - 3.5 x 3 x 2.5 cm


(click on an image to enlarge)

Boleite from Amelia Mine, Santa Rosalia, Baja Sur, Mexico [db_pics/pics/c276a.jpg] Boleite from Amelia Mine, Santa Rosalia, Baja Sur, Mexico [db_pics/pics/c276b.jpg] Boleite from Amelia Mine, Santa Rosalia, Baja Sur, Mexico [db_pics/pics/c276c.jpg]

Cluster of Boleite cubes on matrix. Main crystal is a relatively large 1.1cm on the diagonal.


C278 - Calcite $ 280 (=~ £ 201)
Zacatecas, Mexico
miniature - 5 x 3.5 x 3.3 cm


(click on an image to enlarge)

Calcite from Zacatecas, Mexico [db_pics/pics/c278a.jpg] Calcite from Zacatecas, Mexico [db_pics/pics/c278b.jpg] Calcite from Zacatecas, Mexico [db_pics/pics/c278c.jpg]

Cluster of clear, transparent scalenohedral Calcite crystals, some with black inclusions. Bright and showy.


C279 - Cinnabar $ 450 (=~ £ 324) DISCOUNTED 50% OFF TO $ 225 (=~ £ 162)
Red Bird Mine, Antelope Springs District, Pershing Co., Nevada, USA
cabinet - 9.5 x 5 x 4.5 cm


(click on an image to enlarge)

Cinnabar from Red Bird Mine, Antelope Springs District, Pershing Co., Nevada, USA [db_pics/pics/c279a.jpg] Cinnabar from Red Bird Mine, Antelope Springs District, Pershing Co., Nevada, USA [db_pics/pics/c279b.jpg] Cinnabar from Red Bird Mine, Antelope Springs District, Pershing Co., Nevada, USA [db_pics/pics/c279c.jpg] Cinnabar from Red Bird Mine, Antelope Springs District, Pershing Co., Nevada, USA [db_pics/pics/c279d.jpg]

Deep red, translucent twinned Cinnabar crystals on matrix associated with Quartz crystals. Hard to find specimen from an uncommon old locality.


C282 - Ilmenite $ 400 (=~ £ 288)
Kragero Ilmenite Mines, Kragero, Norway
miniature - 4.4 x 3 x 2.8 cm


(click on an image to enlarge)

Ilmenite from Kragero Ilmenite Mines, Kragero, Norway [db_pics/pics/c282a.jpg] Ilmenite from Kragero Ilmenite Mines, Kragero, Norway [db_pics/pics/c282b.jpg] Ilmenite from Kragero Ilmenite Mines, Kragero, Norway [db_pics/pics/c282c.jpg]

Single Ilmenite crystal with a metallic grey/black color. Ex. Scott Williams with 2 old labels.


C284 - Cinnabar in Calcite $ 600 (=~ £ 432)
Terlingua, Brewster Co., Texas, USA
thumbnail - 2.8 x 1.8 x 1.5 cm


(click on an image to enlarge)

Cinnabar in Calcite from Terlingua, Brewster Co., Texas, USA [db_pics/pics/c284a.jpg] Cinnabar in Calcite from Terlingua, Brewster Co., Texas, USA [db_pics/pics/c284b.jpg] Cinnabar in Calcite from Terlingua, Brewster Co., Texas, USA [db_pics/pics/c284c.jpg]

Single yellow scalenohedral Calcite crystal with a sharp phantom of Cinnabar. This is a rare specimen from the old mercury mining district of Terlingua, located near the Mexican border. Cinnabar was discovered here in the 1880s, creating a temporary mining town, now nothing remains but a ghost town.


C285 - Cinnabar in Calcite $ 400 (=~ £ 288) DISCOUNTED 50% OFF TO $ 200 (=~ £ 144)
Terlingua, Brewster Co., Texas, USA
miniature - 3.8 x 1.6 x 1.3 cm


(click on an image to enlarge)

Cinnabar in Calcite from Terlingua, Brewster Co., Texas, USA [db_pics/pics/c285a.jpg] Cinnabar in Calcite from Terlingua, Brewster Co., Texas, USA [db_pics/pics/c285b.jpg]

Single yellow scalenohedral Calcite crystal with a sharp phantom of Cinnabar. This is a rare specimen from the old mercury mining district of Terlingua, located near the Mexican border. Cinnabar was discovered here in the 1880s, creating a temporary mining town, now nothing remains but a ghost town.


C286 - Diaspore $ 950 (=~ £ 683)
Aydun, Mugula, Turkey
miniature - 4 x 2.5 x 1.1 cm


(click on an image to enlarge)

Diaspore from Aydun, Mugula, Turkey [db_pics/pics/c286a.jpg] Diaspore from Aydun, Mugula, Turkey [db_pics/pics/c286b.jpg] Diaspore from Aydun, Mugula, Turkey [db_pics/pics/c286c.jpg]

Bright and gemmy V-twin crystal of Diaspore. This is about as free of damage as they get, with both tips undamaged with natural tapering terminations or possibly with flat contact faces on parts. It's also very glassy and bright with lots of internal transparency.


C287 - Fluorite with Scheelite $ 350 (=~ £ 252)
Quan Zhou, Fujian Prov., China
small cabinet - 6 x 5 x 4 cm


(click on an image to enlarge)

Fluorite with Scheelite from Quan Zhou, Fujian Prov., China [db_pics/pics/c287a.jpg] Fluorite with Scheelite from Quan Zhou, Fujian Prov., China [db_pics/pics/c287b.jpg] Fluorite with Scheelite from Quan Zhou, Fujian Prov., China [db_pics/pics/c287c.jpg]

Deep purple Fluorite crystals to 2.8cm on matrix associated with Scheelite crystals and Calcite. The Scheelite crystals reach 1cm in size.


C295 - Stibnite $ 950 (=~ £ 683)
Ichinokawa Mine, Ehime Pref. Shikoku Island, Japan
small cabinet - 7.3 x 1.7 x 1 cm


(click on an image to enlarge)

Stibnite from Ichinokawa Mine, Ehime Pref. Shikoku Island, Japan [db_pics/pics/c295a.jpg] Stibnite from Ichinokawa Mine, Ehime Pref. Shikoku Island, Japan [db_pics/pics/c295b.jpg] Stibnite from Ichinokawa Mine, Ehime Pref. Shikoku Island, Japan [db_pics/pics/c295c.jpg]

Terminated single Stibnite crystal from the classic Japanese locality. Fine quality undamaged crystal out of the Don Boydston collection.
(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

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