| 11. | Ilmenite is an important accessory mineral.
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| 12. | Apatite and zircon form accessory minerals.
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| 13. | Distinctive accessory minerals include : fluorite, topaz, apatite, spinel, allanite, sphene and cassiterite.
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| 14. | It appears in a small amount as an accessory mineral in many igneous, metamorphic and sedimentary rocks.
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| 15. | Rutile is found as an accessory mineral in some altered igneous rocks, and in certain gneisses and schists.
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| 16. | Boggs divides them into four categories; major minerals, accessory minerals, rock fragments, and chemical sediments.
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| 17. | Accessory minerals in the orebody include nickeline, gersdorffite, millerite, chromite and occasionally other arsenic sulfide minerals.
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| 18. | Accessory minerals include ilmenite, chromite, magnetite and an aluminium phase ( plagioclase, spinel or garnet ).
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| 19. | A number of gas rich inclusions and accessory minerals are also present, including topaz, xenotime and zircon.
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| 20. | Accessory minerals are associated with those whose presence in the rock are not directly important to the classification of the specimen.
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