Haemoilmenite, ilmenohaematite and rutile. Allard Lake, Quebec, Canada




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125µm


Haemoilmenite crystals comprise an ilmenite host (pink browns) which shows faint reflection pleochroism and haematite exsolution bodies which contain fine-grained exsolved ilmenite (ilmenohaematite) (bottom left). Many of the ilmenohaematite bodies carry rutile laths (lilac-grey, centre left) which are oriented perpendicularly to the fine-grained ilmenite exsolution. The dark grey area is silicate and black areas are polishing pits.


Polished block, plane polarized light, x 160, oil



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