Jericho kimberlite pipe, Contwoyto Lake, Kitikmeot Region, Nunavut, 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.

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. ...

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

Kimberlite, Pyrope, Ilmenite (picroilmenite), Olivine, lithic fragments; 7.8 cm across. Jericho Pipe (Carat Lake), Contwoyto Lake, Kitikmeot Region, Nunavut, Canada. Private collection; Mark Mauthner photo. Scale bar is one inch, mark at 1 cm.

© Mark Mauthner

Kimberlite, diopside (greenish chrome diopside), olivine, lithic fragments, (diopside phenocryst 5.2 cm long). Jericho Pipe (Carat Lake), Contwoyto Lake, Kitikmeot Region, Nunavut, Canada. Private collection; Mark Mauthner photo.

© Mark Mauthner

"The defunct Jericho Diamond Mine, Nunavut, Canada. The mine site (buildings and fuel tank farm) is visible in the background behind the open pit." Wikimedia Commons photo (Oct. 19, 2010) & caption by Tom Churchill.

© Tom Churchill