Mineral Identification : Staurolite and Andalusite

Luster - vitreous, sub vitreous, earthy
Streak - NA, harder than streak plate
Hardness - 6.5-7.5
Density - moderately dense
Cleavage - poor
Color - earthy tones, browns, black
Crystal system - andalusite = orthorhombic, staurolite = monoclinic
Crystal form/habit - staurolite perfect euhedral crystals, andalusite blocky and tabular
Extra notes - grey cross on andalusite formed by interstitial graphite (chiastolite), staurolite is commonly twinned (cruciform twinning)

[@josetas7225]

Please continue with this channel. I think this is a good tool for geology students who don't have access to minerals due to virtual classes

[@mochizzz2100]

Truuuu

[@SiloSimon]

Such a cool channel. I hope some day that it might continue, some of my favorite videos on youtube :)

[@CP-mb7ly]

Hello! I just wanted to say that my wife and I have been thrilled with your content! We're amateur rockhounds and your channel has been a fantastic resource for knowledge; we've really enjoyed watching your videos!
We were saying to each other that you do a fantastic job describing the features of each rock, the surface, luster, formation, etc and you also do something really well that a lot of other channels don't do, which is great camera work and lighting! You know exactly how to focus the camera and let the light do the rest to show the samples. You also have a really nice voice for narrating - good volume and audio quality, enunciation, great pacing, etc. I was a language teacher so that was very important to me in selecting quality audio materials!
As a sidenote, we'd love to see amblygonite! Thanks for the great lessons and we hope you'll be able to put up more videos if you're able :-)

[@magnuswootton6181]

quality content here, much better than other places.

[@bobsmith3931]

Love your videos. Can’t wait for more!

[@soniashapiro4827]

Very informative. Thank you.