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C218 - Pink Tanzanite $ 200
Merelani Hills, Arusha, Tanzania
thumbnail - 1.8 x 0.7 x 0.4 cm


Pink Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c218a.jpg] Pink Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c218b.jpg]

Gemmy pink Tanzanite crystal with a stepped but undamaged termination.


C231 - Diamond $ 2500
Sierra Leone
thumbnail - 1.3 x 1.2 x 1.2 cm


Diamond from Sierra Leone [db_pics/pics/c231a.jpg] Diamond from Sierra Leone [db_pics/pics/c231b.jpg] Diamond from Sierra Leone [db_pics/pics/c231c.jpg] Diamond from Sierra Leone [db_pics/pics/c231d.jpg]

Complete octahedral Diamond crystal. Great luster with trigonal hillocks and indentations. All tips are present, with two showing stepped growth, possibly due to twinning. Translucent with gem zones. Stunning and rare gem crystal. Weighs 7.55 carats.


C233 - Diamond $ 1000
Angola
thumbnail - 0.8 x 0.8 x 0.6 cm


Diamond from Angola [db_pics/pics/c233a.jpg] Diamond from Angola [db_pics/pics/c233c.jpg] Diamond from Angola [db_pics/pics/c233d.jpg] Diamond from Angola [db_pics/pics/c233e.jpg]

Octahedral Diamond crystal with a smaller attached crystal. Great luster and transparency. An octahedron but bottom tip is truncated and slightly indented forming a relatively flat bottom surface. Weighs 2.0 carats.


C234 - Diamond $ 1600
Argyle Mine, Western Australia, Australia
thumbnail - 0.7 x 0.7 x 0.7 cm


Diamond from Argyle Mine, Western Australia, Australia [db_pics/pics/c234b.jpg] Diamond from Argyle Mine, Western Australia, Australia [db_pics/pics/c234c.jpg] Diamond from Argyle Mine, Western Australia, Australia [db_pics/pics/c234d.jpg] Diamond from Argyle Mine, Western Australia, Australia [db_pics/pics/c234e.jpg]

Complete octahedral Diamond crystal. Great luster with a pink/purple/brown coloration. Weighs 1.75 carats.


C235 - Diamond $ 1900
Congo
thumbnail - 0.8 x 0.8 x 0.7 cm


Diamond from Congo [db_pics/pics/c235a.jpg] Diamond from Congo [db_pics/pics/c235b.jpg] Diamond from Congo [db_pics/pics/c235c.jpg]

Complete Diamond crystal in the form of a distorted cube. The surface has a dimpled appearance, but it appears clear inside. Weighs 3.25 carats.


C240 - Diamond $ 1800
South Africa
thumbnail - 1.3 x 1.2 x 1.1 cm


Diamond from South Africa [db_pics/pics/c240a.jpg] Diamond from South Africa [db_pics/pics/c240b.jpg] Diamond from South Africa [db_pics/pics/c240c.jpg]

Complete octahedral Diamond crystal. Great luster with surface growth features. Translucent with gem zones. Weighs 8.25 carats.


C239 - Diamond $ 2800
South Africa
thumbnail - 1.4 x 1.3 x 1.2 cm


Diamond from South Africa [db_pics/pics/c239a.jpg] Diamond from South Africa [db_pics/pics/c239b.jpg] Diamond from South Africa [db_pics/pics/c239c.jpg] Diamond from South Africa [db_pics/pics/c239d.jpg]

Complete octahedral Diamond crystal. Great luster with surface growth features. All tips present, with one tip stunted with multiple tips. Translucent with gem zones. Weighs 8.8 carats.


C236 - Diamond $ 1400
Botswana
thumbnail - 0.8 x 0.7 x 0.7 cm


Diamond from Botswana [db_pics/pics/c236a.jpg] Diamond from Botswana [db_pics/pics/c236b.jpg] Diamond from Botswana [db_pics/pics/c236c.jpg]

Complete octahedral Diamond crystal. Great luster and very gemmy. Weighs 1.75 carats.


C241 - Diamond $ 1700
Premier Mine, South Africa
thumbnail - 0.8 x 0.7 x 0.5 cm


Diamond from Premier Mine, South Africa [db_pics/pics/c241a.jpg] Diamond from Premier Mine, South Africa [db_pics/pics/c241b.jpg] Diamond from Premier Mine, South Africa [db_pics/pics/c241c.jpg]

Complete, flattened octahedral Diamond crystal. Great luster and highly gemmy with an inclusion. Weighs 2.15 carats.


C252 - Chrome Dravite $ 350
Landani, Tanzania
thumbnail - 2.5 x 0.9 x 0.9 cm


Chrome Dravite from Landani, Tanzania [db_pics/pics/c252a.jpg] Chrome Dravite from Landani, Tanzania [db_pics/pics/c252b.jpg] Chrome Dravite from Landani, Tanzania [db_pics/pics/c252c.jpg]

Deep chrome green Dravite crystal with a curious clear (Achroite) termination. Translucent with excellent color and undamaged.


C254 - Malachite after Azurite $ 100
Sacramento Mine, Bisbee, Arizona, USA
thumbnail - 2.5 x 2 x 1.5 cm


Malachite after Azurite from Sacramento Mine, Bisbee, Arizona, USA [db_pics/pics/c254a.jpg] Malachite after Azurite from Sacramento Mine, Bisbee, Arizona, USA [db_pics/pics/c254b.jpg] Malachite after Azurite from Sacramento Mine, Bisbee, Arizona, USA [db_pics/pics/c254c.jpg]

Pair of well fomred, crossing psuedomorphs of Malachite after Azurite.


C269 - color change Dravite $ 200
Nchongo, Umba Valley, Tanzania
thumbnail - 1.3 x 1.1 x 1 cm


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
Nchongo, Umba Valley, Tanzania
thumbnail - 1.6 x 1.4 x 1.2 cm


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 DISCOUNTED 40% OFF TO $ 90
Nchongo, Umba Valley, Tanzania
thumbnail - 1 x 0.9 x 0.8 cm


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.


C284 - Cinnabar in Calcite $ 600
Terlingua, Brewster Co., Texas, USA
thumbnail - 2.8 x 1.8 x 1.5 cm


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.



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