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SOME POINTERS:
Photos typically include their locations, so you can use locations as keywords too. You get more hits with shorter words, and fewer hits as you become increasingly specific with increasing numbers of keywords. It’s best to use singular rather than plural (eg “volcano” instead of “volcanoes”).
As some words are included in others (“salt” within “basalt,” for example) you might want to be more specific to avoid getting a bunch of irrelevant photos.
Or you can just scroll down and see the most recently added photos… Enjoy!
Kyanite crystals
Kyanite crystals, showing their typical bladed habit (201210-33) aluminosilicate
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Galena -Lead sulfide
Galena crystals, showing their typical blocky habit and cubic cleavage (201210-26)
Download ImagePyroxene -augite
Augite (pyroxene) crystals. The one on the right shows its 90° cleavage (201210-24)
Download ImagePlagioclase feldspar
Plagioclase feldspar. Piece on the left side shows its characteristic polysnthetic twinning. (201210-22)
Download ImageMuscovite and Biotite mica
Muscovite and biotite, white and black mica, showing strong platy cleavage typical of phyllosilicate minerals (201210-17)
Download ImageBiotite mica
Biotite, black mica, showing strong platy cleavage typical of phyllosilicate minerals (201210-14)
Download ImageMuscovite mica
Muscovite, white mica, showing strong platy cleavage typical of phyllosilicate minerals (201210-13)
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gypsum crystals
gypsum crystals, hydrated calcium sulfate, showing strong cleavage (201210-8)
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Muscovite mica (Pan)
muscovite, white mica, showing strong platy cleavage typical of phyllosilicate minerals (201119-7)
Download ImageMuscovite mica
Muscovite, white mica, showing strong platy cleavage typical of phyllosilicate minerals (201119-5)
Download ImagePorphyritic andesite (square)
Porphyritic andesite, with phenocrysts of plagioclase (201118-70)
Download ImageHornblende crystals in diorite
Needle-like hornblende crystals in diorite (201118-07)
Download ImageHCl reacting with limestone
Hydrochloric acid reacting with limestone –causing release of carbon dioxide and a resulting “fizz”. (201111-22)
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