An introduction to mineral identification with a look at some of the common mineral lusters. Metallic, sub-metallic, vitreous, glassy, pearly, dull, waxy, and satin.
To some extent, luster is somewhat subjective. I would not say any of the mica's (such as muscovite, biotite, lipidolite) are truly metallic. One could possibly classify them as sub-metallic. Vitreous and pearly are far better descriptors of the luster of these minerals.
Thank you. Luster and cleavage are two complicated properties of minerals I struggle with. Why a graphite has metallic luster, why augite, hornblende have non metallic luster, I always get confused. Mica's pearly luster, it may somewhat make easier now. Thank you
@@20ta So much depends on the quality of the sample you are examining... often lab/classroom samples are not the best to show various properties. If you have a pure sample of graphite, it will look quite metallic (possibly also greasy)
Thanks a lot for explaining the topics with examples avoiding any complexities..It was a great help
hey, you made this video 12 days after my birthday. What a great birthday wish!
metallic
sub- metallic
greasy
vitrious
adamantine
dull
pearly
resinous
waxy
satin like
Nice
Awesome video!!
Good video but the audio is a bit sharp in the ears while wearing headphones. Thank-you Hope this helps
That first gem that you showed looked a lot like a diamond
Quartz like one too!!!!
Great video!
Muscovite or biotite also are shiny. Do they have metallic luster
To some extent, luster is somewhat subjective. I would not say any of the mica's (such as muscovite, biotite, lipidolite) are truly metallic. One could possibly classify them as sub-metallic. Vitreous and pearly are far better descriptors of the luster of these minerals.
Thank you. Luster and cleavage are two complicated properties of minerals I struggle with. Why a graphite has metallic luster, why augite, hornblende have non metallic luster, I always get confused. Mica's pearly luster, it may somewhat make easier now. Thank you
@@20ta So much depends on the quality of the sample you are examining... often lab/classroom samples are not the best to show various properties. If you have a pure sample of graphite, it will look quite metallic (possibly also greasy)
I have the hardest one a diamond
Good info, but I wish you had done the video zoomed in.
he sounds like someone is holding a gun to his head
1) 0:01-2:00 ( metallic
2) 2:27 (vitrious luster
3) 4:00 (dull
4)4:40 perarly or vitrious
Vastrious luster good for natural ruby ?
tnx papicholo
greasy