Little if anything relating to the occurrence of bornite is in any of the literature we've been able to access. Nor has there been mention of chalcopyrite. That Fred Parker's sharp eye spotted this bornite specimen does not surprise us. We managed within a few seconds to observe chalcopyrite in dolostone boulders piled up near the Bluegrass Texas Quarry sign when shooting our title picture.
Other species known to occur at the Texas Quarry are as follows :pyrite, tremolite, pink dolomite, wollastonite, fuchsite, purple fluorite, dendrites (probably manganese oxide), galena, pyrrhotite, quartz, sphene, talc, chlorite, molybdenite, margarite, diopside, and asbestos.
Before posting we contacted Fred Parker in New Mexico to conifrm that he had not only provided but personally field collected the pictured bornite, rutile, and pargasite as noted.. After confirming this, he shared two facinating remembrances
- A specimen from a find circa 1935 labeled "sphalerite on limestone."
Associated with dolomite crystals,they are stacked hexagaonal plates that appear to be sphalerite. I believe these are sphalerite after wurtzite paramorphs and good ones at that. Fred recalled where this specimen was housed when he observed it. If still in the same collection and access can be arranged, we'll cover it in a subsequent post.
- AMAZING DRAVITE
I also recall in the early-mid 1990's a blast in which a boulder at the base of the rubble pile contained the best dravites I ever saw from Texas, as I recall 3 to 4 inch crystals. They could not be safely recovered so went to the crusher.