thyrsis1971 (November 30, 1999 at 12:00 am)

Regrettably, there are so many things wrong with this video, that even with the changes it's very misleading! Galena is lead sulfide (PbS2), not sulfate. Obsidian is not quartz. The confusion of terms between "rock" and "mineral" is glaring. The chalcopyrite is likely bornite - they have a subtly different streak, which would be visible if the presenter had used a bit of old tile, rather than sandpaper(!). Viewers, please approach this video with caution. Any good field guide would be better.

lulucaty2406 (November 30, 1999 at 12:00 am)

wow nice

MrToxicheyna7 (November 30, 1999 at 12:00 am)

@stuckurface can you possibly take a good quality video of it? i also have a metallic looking rock that I've also found in caves up in North Carolina.

maxwill445 (November 30, 1999 at 12:00 am)

lol cleavage XD lol

stuckurface (November 30, 1999 at 12:00 am)

PLEASE HELP! I found this metallic rock on my road (which is dirt) and I have searched for years on what it is and I have found nothing that matched

JDeav05 (November 30, 1999 at 12:00 am)

Thank you for the video! Much easier to understand than my current Earth Science professor!

zaaz369 (November 30, 1999 at 12:00 am)

galena is my fave :)

CharlieMoher (November 30, 1999 at 12:00 am)

pump up the volume....some of us are on laptops

pringlewrangler (November 30, 1999 at 12:00 am)

chocolate truffles!

rufiyagiou (November 30, 1999 at 12:00 am)

thanks for this..do you have video about importance of minerals?