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Jericho kimberlite pipe, Contwoyto Lake, Northwest Territories, Canada
Kimberlite specimen from the Jericho Pipe, NWT, Canada, Canada's third diamond mine to come into operation. This specimen has all the classic kimberlite indicator minerals (KIMs) - green chromium diopside, red-purple garnet, olivine, and even a picro-ilmenite on the reverse. Specimen is 3cm wide and chromium diopside is 1.5cm by 1.3cm by 0.5cm. ... |
| © J. Nemitz | Photo ID: 174942 View Count: 168 |
Garnet Group : X3Z2(TO4)3 (X = Ca, Fe, etc·, Z = Al, Cr, etc·, T = Si, As, V) |
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Jericho kimberlite pipe, Contwoyto Lake, Northwest Territories, Canada
Sample of kimberlite with garnet from the Jericho Pipe, NWT, Canada, Canada's third operating diamond mine. Garnets that are high in chromium and low in calcium are called G-10 garnets and indicate the possibility of diamonds. Specimen is 3cm long and the garnet is 0.5cm by 0.5cm. Obtained from an original prospector and in the American ... |
| © J. Nemitz | Photo ID: 174941 View Count: 156 |
Olivine : (Mg,Fe2+)2[SiO4], Garnet Group : X3Z2(TO4)3 (X = Ca, Fe, etc·, Z = Al, Cr, etc·, T = Si, As, V), Diopside (Var: Chromian Diopside) : (Ca,Cr)MgSi2O6 |
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Jericho kimberlite pipe, Contwoyto Lake, Northwest Territories, Canada
Sample of kimberlite (4.9cm by 4.1cm) from the Jericho kimberlite pipe, Contwoyto Lake, Northwest Territories, Canada. Kimberlite indicator minerals include red garnet (lower right), grass green chromium diopside (lower right), and yellow-green olivine (throughout). In the American Kimberlite collection of J. Nemitz. |
| © J. Nemitz | Photo ID: 235226 View Count: 94 |
