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Nah, don't let your heart be broken that easily. ;) 'Abrasive grade garnet' sounds like garnet particles for use in abrasive compounds. Doesn't mean anything as far as the suitability of the matrix,...

Largest coticule deposits to my knowledge are in Chile. Coticule is nowadays used by geologists to describe a type of rock with a certain mineral make up and formation history. This has nothing to do...

See also this interesting thread, and this one.