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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.


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.


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.


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.


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.


C237 - Diamond $ 5500
Williamson Mine, Tanzania
thumbnail - 1.6 x 1.5 x 1.5 cm


Diamond from Williamson Mine, Tanzania [db_pics/pics/c237a.jpg] Diamond from Williamson Mine, Tanzania [db_pics/pics/c237b.jpg] Diamond from Williamson Mine, Tanzania [db_pics/pics/c237c.jpg] Diamond from Williamson Mine, Tanzania [db_pics/pics/c237d.jpg]

Complete octahedral Diamond crystal with lots of trigonal hillocks on the surface. Translucent with gem zones.There are inclusions that give it a darker and yellowish appearance in ambient light, however when backlit (see photo), it's more transparent, white characteristics are evident. Large diamond crystals such as this are now very hard to come by. Weighs 17.8 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.


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.


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.


C251 - Copper after Cuprite $ 280
Rubtsovskiy Mine, Altayskiy Kray, Siberia, Russia
thumbnail - 2.6 x 2.1 x 2 cm


Copper after Cuprite from Rubtsovskiy Mine, Altayskiy Kray, Siberia, Russia [db_pics/pics/c251a.jpg] Copper after Cuprite from Rubtsovskiy Mine, Altayskiy Kray, Siberia, Russia [db_pics/pics/c251b.jpg] Copper after Cuprite from Rubtsovskiy Mine, Altayskiy Kray, Siberia, Russia [db_pics/pics/c251c.jpg] Copper after Cuprite from Rubtsovskiy Mine, Altayskiy Kray, Siberia, Russia [db_pics/pics/c251d.jpg]

Superb thumbnail sized specimen of Copper psuedomorphs after Cuprite. My favorite specimens from this find and those such as this one with partially psuedomorphed Cuprite along with fully psuedomorphed Cuprite. This specimen is a cluster of about 10 crystals with 3 that retain a good amount of the original Cuprite. Complete all around, floater specimen. One small nick at the top, otherwise undamaged.


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.



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