Vote #quartz! I found this doubly terminated Herkimer “Diamond” in NY a few years ago by cracking tons of dolostone searching for vugs coated in small quartz crystals (druzy) that are black from hydrocarbons. This piece opened, but not enough to let the crystal fall. I kept it like this b/c it’s rad

#Quartz var. Flint - school children promoted the idea Knife River Flint should be the state rock of North Dakota. It was approved! Historically widely used and traded by indigenous peoples.

Quartz terminations co-precipitated with iron oxides, turning them a delightful burgundy brown. Sample from Bavaria, but now our teaching collection.

#MinCup26 #Quartz #IronOxide #Bavaria

Damn you beat me to it.
While I love pencil-and-paper work I must give it up for #Quartz. Just the oscillators alone make the world go round - almost every electronic device has one!
Every phone, smartwatch, PC, TV etc. all require a reference frequency generator - a quartz crystal!

💔✏️❤️💠

Go Team #Quartz this year for #MinCup26!

Herkimer diamonds are naturally double-terminated quartz crystals with exceptional clarity, mined primarily in Herkimer County, New York. Double termination is very rare in quartz. Link for more info in ALT!

#Quartz #MinCup26

Quartz veins in slate show the deformation and material transport accompanying the growth of the Appalachians.

#MinCup26 #Quartz #Quebec #Gaspésie

A geologic dyke (or dike) is a sheet-like body of rock that cuts vertically or steeply across the layers of pre-existing older rocks. In this case, a quartz dike. These cross-cutting relationships allow relative dating of geologic features.

#Quartz #MinCup26

#Quartz for the win, then!

Diamonds are a girl's best friend. But if you cannot afford diamonds, #quartz will do nicely, but #graphit won't.

Vote #quartz!
📸 MAURO CATEB from Brazil

I have so much more to write about #graphite! But it’s all so weird & new to me that confirming I’ve gotten it right is A Task.

But if #quartz wins today and again tomorrow, I never need to write about it again… (It’s legit a cool mineral, but it’s been 10 years.)

#MinCup26 choices!

Quartz is a common mineral, with some very important and uncommon properties. One is piezoelectricity. When quartz is squeezed, it generates an electric charge. Together, quartz and earthquakes can promote the formation of gold nuggets, that can be quite large.

#Quartz #MinCup26

There can only be winners for me here but this and all the last time(s), #quartz it must be.

#Quartz #MinCup26

Did I vote? Of quartz I did!
#Quartz

Laser cut Amethyst gemstone 14.80 CTS available in our Etsy store www.puritygems.etsy.com
#gemstone #crystal #quartz #amethyst #jewelry #canada