#calcitic

[villowrose]

could you draw Lapis Lazuli?

thank you for the ask!!

here is lapis on the beach!

[catnoli]

carrd | faq | ko-fi | shop

honey calcite lemon shark 🍯🍋🦈 this shark is for cancers ♋️ ^_^

[necroticboop]

💎 shiny rocks make brain go brrrr ✦ dragon scale calcite [x]

[marblegroves]

What do you mean the robot battle didn’t go like this?

[geologyin-blog]

Natural Calcite crystals “Flowers”

From Rio Grande do Sul, Brazil

Photo: Thomas Spann

[theoldbone]

Calcite flower from the Chenzhou Prefecture in the Hunan Province, China. Photo by Tom Spann

[heartnosekid]

honey calcite spheres 🌼 | source

[roosaurusrin]

Captorhinus skulls with pyrite and calcite crystal growth.

Captorhinus were anapsids from the Permian - meaning their skulls did not have the normal fenestration that diapsid reptiles or synapsid mammals have. Named for their hooked snout, these reptiles had a pineal(or "third") eye - a small photoreceptive spot on the top of the skull not seen in the pictures here.

[vugnasmineralblog]

Orpiment & Calcite | Jiepaiyu Mine, Shimen, Shimen County, Changde, Hunan Province, China (Peoples Republic)

[reddpenn]

Do you have any neat calcites?

Do I ever!! Here are just a few of my favorites.

Here’s a specimen of huge brown barite crystals on a druzy of yellow calcite, from Elk Creek South Dakota.

Under a long wave UV light (365nm), the calcite fluoresces yellow, and the barite fluoresces pale blue.

The barite also has very strong yellow-green phosphorescence, meaning it glows in the dark for a while after the UV light is removed!

This is mangano calcite, a form of calcite that gets its faint pink color from manganese.

This specimen features lenticular crystals and a cool “pagoda” formation!

And of course, here it is showing off what mangano calcite is most famous for: its gorgeous orange-pink fluorescence.

Here is some classic optical calcite! Although it’s often called "Iceland Spar", this particular specimen is from Mexico.

Optical calcite is known for its birefringence, an optical effect in which it doubles the image behind it! This is because calcite’s crystal structure polarizes the light passing through it, splitting it into horizontal and vertical wavelengths. All calcite technically does this; we can just see it happening in optical calcite because it is very clear and easy to see through.

This beautiful, water-clear specimen of dogstooth calcite crystals is from Linwood Mine in Iowa. It features very distinct phantoms!

Phantoms form when a thin layer of some other mineral begins growing on the surface of the crystal. As the calcite continues to grow, that layer becomes trapped inside of the crystal, becoming a faint record of the crystal’s size and shape when it was much younger! Calcite phantoms are especially interesting because their image is distorted by birefringence.

This piece is a columnar calcite from Fujian Provence, China! Note the uncommon column shapes of the crystals.

It fluoresces a lovely orange red!

And of course my favorite calcite of all! This specimen is cobaltocalcite from Morocco. While that hot pink color looks totally dyed and fake, it’s actually completely natural! Cobaltocalcite gets its distinctive color from atoms of cobalt in its molecular structure.

There's more calcite in my collection, but these are the best, I think!

[dozydawn]

birefringence & fluorescence from lasers through calcite

[dronepikachu]

For Marbles's 10k DTIYS on Twitter!! 💜💛💙

i had a lot of fun with drawing these sillies!! <33

their designs are so unique and stand out so much!

Fusions made by the amazing @marblegroves!

Au created by @chrisrin!

[chip-the-dip]

I drew this for @marblegroves 10k dtiys over on twitter

Also the full body drawings because I worked hard and wan’t yall to see them

Also they’re tiny doodles on each drawing 😊

[marblegroves]

What would fusion be without the pre-fuse dances?

[geologyin-blog]

Emerald crystal and Pyrite on Calcite

Muzo, Western Emerald Belt, Boyacá, Colombia.

Photo: jewelmelon_

[theoldbone]

Vanadinite, calcite, Black Prince Mine, AZ, USA, photo by Michael Michayluk