How Gemstones Form From Igneous & Metamorphic Processes (12 Examples!) GEO GIRL

References:

0:00 What are Gemstones?
1:36 How do Gemstones Form?
3:19 List of Gemstones
4:08 How Diamonds Form
7:45 Diamond Colors
9:51 How Ruby & Sapphire Form
12:00 How Tourmaline Forms
12:40 Pegmatite Tourmaline
15:14 Tourmaline Colors
15:45 How Emerald & Aquamarine Form
17:43 How Garnet Forms
20:05 Garnet Varieties (Colors)
21:02 How Peridot Forms
23:08 How Jade Forms
25:27 How Topaz Forms
26:03 How Lapis Lazuli Forms
27:38 How Turquoise Forms

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[GEOGIRL]

CORRECTION: I was wrong about jade! Sorry guys, I clearly got sloppy with my research near the end of the gem list. Jade refers to either jadeite or nephrite, not a mixture of the two. There is no such thing as a 'jadeite-nephrite mixture'. They are both formed in metamorphic zones of oceanic-continental crust collisions, but in different environments. Jadeite is a pyroxene that forms along the oceanic crust boundary in blueschist and eclogite facies metamorphism, under high pressure. Nephrite is an amphibole that forms during metasomatic replacement of serpentinite in the mantle wedge, under lower pressure. People didn’t learn until the 1860s that the two types of jade were very different mineral species, so we continue to call both minerals “jade”, but they are always found separately, not together! Thank you @tedetienne7639 for pointing this out! Sorry again everyone for the misinformation!

[nerdysenpai]

Hey, Geo Girl, You're the best😘😘😜😜. I have been scoring high grades in mineralogical exploration thanks to you

[tedetienne]

Excellent video! Thank you! I studied gemology for a while, and I really enjoyed how they have their own understanding and terminology about gems. It’s definitely its own thing within geology that deserves more attention, like this video. Also, I thought you were on a break, but I just KNEW you couldn’t stay away for too long! You’re just too passionate about geology, and too good at teaching it!

[harrietharlow]

Very interesting! I'm a geology fan and now I understand formation of gemstones better. Thank you so much for uploading!

[Prefex]

Fantastic video!! That 30 minutes flew by omg! Good job!

[ashajacob]

Good to see you again Geo Girl!☺️ You reached 31k wow! Last time I came it was less than 10k glad your channel is growing I hope this channel will reach 100k 😊

[BackYardScience]

Oh! I love this subject! I'd would also love to see a video on the formation of agates, chalcedony, quartz and others like them like Jasper. I've been collecting a LOT of samples from our local sources here in eastern Kentucky and there are some weird, giant, colorful and very odd agates/flints around here. I've found some the size of cinder blocks and you can tell that they broke off from other larger pieces. I just can't seem to find the source layers that they come from and can only find them in the creeks and rivers.

[kokopelli]

I grew up loving geology and especially crystals. I learned a whole bunch of new things from your video so thank you!

[lvtmnt]

Dimond are this girls' best lapidary tool. Dimond coated blades and drill bits!

[jocelynlewis]

Hi! Love your videos 😊, I would love to hear about why transition metals and how they cause different colors

[christianhunt]

Way cool topic, GeoGirl Rocks! I was lowkey waiting for some gemstone and fancy mineral vids, fantastic al always!

[Pappaoh]

Fantastic vid packed with so much great material!

[Splarkszter]

Oh, wow, the sheer qualit of this. It's

I hugely love this much.

Thank you for your insane high quality work, your website is also incredibly beautiful. THANK YOU SO MUCH FOR YOUR WORK.

[brianazmy]

If only we had science teachers like her back in the day. She took a half hour and schooled me what it took my teachers months, and this was with a smile. Great video and thanks for sharing this with us.

[tedetienne]

I'd be interested in learning about sodalite, because (1) it's pretty! and (2) I have so little experience with the feldspathoids and quartz-poor minerals, I really need a refresher with them! Also, zircon is rarely used as a gemstone, and it's far more useful for scientific study, but that's why I'd love to hear about how that gemstone is formed! Thank you!

[spindoctor]

Once again, great content. I would love a dedicated video of how transition metals lead to different colours. I like the underlying physics invoved in geology.
I think I can speak for many of your viewers when I say that I genuinely hope you know how much your channel is appreciated.

[JoesFirewoodVideos]

You’ve been MIA, we’ve missed you, we’ve been worried.
I ❤ GEO GIRL!

[peterdore]

I learned so much in this video. Gotta show my friends!

[emilio]

I need someone like you when I'm gem hunting. I found a great spot where lava use to flow/. Found a beautiful black petrified wood. And tons of other shinys.

[curtisblake]

It's fun to listen to someone who can genuinely chuckle while saying something like "within the mantle".